[AT&T Samsung Galaxy S II SGH-I777] Entropy512:
Weird, if anything, changes I've made over the past few weeks should improve boot time and mediascanning - since I have a bunch of ext4 performance tweaks.

As to touchkey lights: In searching back through the thread using the terms "dmesg" and "touchkey", I can only find dmesg dumps posted by lbohn. No other user

Two key themes:

1) lbohn, I think your external SD is dying:

01/07/2012 09:34:52 [ERROR] mmc1: cmd 52 command index error error
01/07/2012 09:34:52 [ERROR] mmc1: cmd 52 command crc error
01/07/2012 09:34:52 [ERROR] mmc1: cmd 52 command index error error
01/07/2012 09:34:52 [ERROR] mmc1: Got command interrupt 0x00060000 even though no command operation was in progress.
01/07/2012 09:34:52 [DEBUG] sdhci: ============== REGISTER DUMP ==============
01/07/2012 09:34:52 [DEBUG] sdhci: Sys addr: 0x00000000 | Version: 0x00002401
01/07/2012 09:34:52 [DEBUG] sdhci: Blk size: 0x00000000 | Blk cnt: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Argument: 0x80000c08 | Trn mode: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Present: 0x000a0000 | Host ctl: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Power: 0x0000000e | Blk gap: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Wake-up: 0x00000000 | Clock: 0x0000000f
01/07/2012 09:34:52 [DEBUG] sdhci: Timeout: 0x00000000 | Int stat: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Int enab: 0x00ff0003 | Sig enab: 0x00ff0003
01/07/2012 09:34:52 [DEBUG] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000001
01/07/2012 09:34:52 [DEBUG] sdhci: Caps: 0x05e80080 | Max curr: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: ===========================================
01/07/2012 09:34:52 [ERROR] mmc1: cmd 8 command index error error
01/07/2012 09:34:52 [ERROR] mmc1: Got command interrupt 0x00060000 even though no command operation was in progress.
01/07/2012 09:34:52 [DEBUG] sdhci: ============== REGISTER DUMP ==============
01/07/2012 09:34:52 [DEBUG] sdhci: Sys addr: 0x00000000 | Version: 0x00002401
01/07/2012 09:34:52 [DEBUG] sdhci: Blk size: 0x00000000 | Blk cnt: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Argument: 0x000001aa | Trn mode: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Present: 0x000a0000 | Host ctl: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Power: 0x0000000e | Blk gap: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Wake-up: 0x00000000 | Clock: 0x0000000f
01/07/2012 09:34:52 [DEBUG] sdhci: Timeout: 0x00000000 | Int stat: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Int enab: 0x00ff0003 | Sig enab: 0x00ff0003
01/07/2012 09:34:52 [DEBUG] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000001
01/07/2012 09:34:52 [DEBUG] sdhci: Caps: 0x05e80080 | Max curr: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: ===========================================
01/07/2012 09:34:52 [ERROR] mmc1: cmd 5 command end bit error
01/07/2012 09:34:52 [ERROR] mmc1: cmd 5 command end bit error
01/07/2012 09:34:52 [ERROR] mmc1: cmd 5 command end bit error
01/07/2012 09:34:52 [ERROR] mmc1: cmd 5 command end bit error
01/07/2012 09:34:52 [ERROR] mmc1: cmd 55 command index error error
01/07/2012 09:34:52 [ERROR] mmc1: Got command interrupt 0x00060000 even though no command operation was in progress.
01/07/2012 09:34:52 [DEBUG] sdhci: ============== REGISTER DUMP ==============
01/07/2012 09:34:52 [DEBUG] sdhci: Sys addr: 0x00000000 | Version: 0x00002401
01/07/2012 09:34:52 [DEBUG] sdhci: Blk size: 0x00000000 | Blk cnt: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Argument: 0x00000000 | Trn mode: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Present: 0x000a0000 | Host ctl: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Power: 0x0000000e | Blk gap: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Wake-up: 0x00000000 | Clock: 0x0000000f
01/07/2012 09:34:52 [DEBUG] sdhci: Timeout: 0x00000000 | Int stat: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Int enab: 0x00ff0003 | Sig enab: 0x00ff0003
01/07/2012 09:34:52 [DEBUG] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000001
01/07/2012 09:34:52 [DEBUG] sdhci: Caps: 0x05e80080 | Max curr: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: ===========================================
01/07/2012 09:34:52 [ERROR] mmc1: cmd 55 command index error error
01/07/2012 09:34:52 [ERROR] mmc1: Got command interrupt 0x00060000 even though no command operation was in progress.
01/07/2012 09:34:52 [DEBUG] sdhci: ============== REGISTER DUMP ==============
01/07/2012 09:34:52 [DEBUG] sdhci: Sys addr: 0x00000000 | Version: 0x00002401
01/07/2012 09:34:52 [DEBUG] sdhci: Blk size: 0x00000000 | Blk cnt: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Argument: 0x00000000 | Trn mode: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Present: 0x000a0000 | Host ctl: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Power: 0x0000000e | Blk gap: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Wake-up: 0x00000000 | Clock: 0x0000000f
01/07/2012 09:34:52 [DEBUG] sdhci: Timeout: 0x00000000 | Int stat: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Int enab: 0x00ff0003 | Sig enab: 0x00ff0003
01/07/2012 09:34:52 [DEBUG] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000001
01/07/2012 09:34:52 [DEBUG] sdhci: Caps: 0x05e80080 | Max curr: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: ===========================================
01/07/2012 09:34:52 [ERROR] mmc1: cmd 55 command index error error
01/07/2012 09:34:52 [ERROR] mmc1: cmd 55 command crc error
01/07/2012 09:34:52 [ERROR] mmc1: cmd 55 command index error error
01/07/2012 09:34:52 [ERROR] mmc1: Got command interrupt 0x00060000 even though no command operation was in progress.
01/07/2012 09:34:52 [DEBUG] sdhci: ============== REGISTER DUMP ==============
01/07/2012 09:34:52 [DEBUG] sdhci: Sys addr: 0x00000000 | Version: 0x00002401
01/07/2012 09:34:52 [DEBUG] sdhci: Blk size: 0x00000000 | Blk cnt: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Argument: 0x00000000 | Trn mode: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Present: 0x000a0000 | Host ctl: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Power: 0x0000000e | Blk gap: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Wake-up: 0x00000000 | Clock: 0x0000000f
01/07/2012 09:34:52 [DEBUG] sdhci: Timeout: 0x00000000 | Int stat: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: Int enab: 0x00ff0003 | Sig enab: 0x00ff0003
01/07/2012 09:34:52 [DEBUG] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000001
01/07/2012 09:34:52 [DEBUG] sdhci: Caps: 0x05e80080 | Max curr: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000
01/07/2012 09:34:52 [DEBUG] sdhci: ===========================================
01/07/2012 09:34:52 [ERROR] mmc1: cmd 1 command end bit error

2) According to the dmesgs, the touchkey LED is being disabled by the BLN app:

01/07/2012 09:35:33 [DEBUG] [TouchKey] BLN resume
01/07/2012 09:35:33 [INFORMATION] S5P_RP: late_resume
01/07/2012 09:35:33 [DEBUG] [TouchKey] melfas_touchkey_late_resume
01/07/2012 09:35:33 [INFORMATION] ld9040 spi3.0: (id=2) brightness=31, bl=1
01/07/2012 09:35:33 [WARNING] LED returned on
01/07/2012 09:35:33 [INFORMATION] ld9040 spi3.0: (id=2) brightness=37, bl=2
01/07/2012 09:35:33 [ERROR] [TSP] Calibration!!!!!!
01/07/2012 09:35:33 [DEBUG] [TouchKey] BLN_ongoing set to false
01/07/2012 09:35:33 [ERROR] [TouchKey] disable LED from BLN app

Which is strange considering you've said that BLN has never touched your phone...