[T-Mobile Samsung Galaxy S II SGH-T989] :
It works!! here are the results:

[**] Zerg rush - Android 2.2/2.3 local root

[**] (C) 2011 Revolutionary. All rights reserved.

[**] Parts of code from Gingerbreak, (C) 2010-2011 The Android Exploid Crew.

[+] Found a GingerBread ! 0x0002e118

[+] Found a Samsung, running Samsung mode

[*] Scooting ...

[*] Sleeping a bit (~40s)...

[*] Waking !

[*] Sending 149 zerglings ...

[*] Sleeping a bit (~40s)...

[*] Waking !

[*] Sending 189 zerglings ...

[+] Zerglings found a way to enter ! 0x18

[+] Overseer found a path ! 0x00030730

[*] Sleeping a bit (~40s)...

[*] Waking !

[*] Sending 189 zerglings ...

[+] Overseer found a path ! 0x00030a18

[*] Sleeping a bit (~40s)...

[*] Waking !

[*] Sending 189 zerglings ...

[+] Zerglings caused crash (good news): 0x40322cd4 0x0074

[*] Researching Metabolic Boost ...

[+] Speedlings on the go ! 0xafd25b05 0xafd395cf

[*] Sleeping a bit (~40s)...

[*] Waking !

[*] Sending 181 zerglings ...

[+] Rush did it ! It's a GG, man !

[+] Killing ADB and restarting as root... enjoy!

#

# export TEMPRANDOM=12124;export PS1=END:$TEMPRANDOM;/data/local/tmp/busybox mount -o rw,remount /system

END:12124export PS1=""

export TEMPRANDOM=20647;export PS1=END:$TEMPRANDOM;mkdir /system/xbin

mkdir failed for /system/xbin, File exists

END:20647export PS1=""

export TEMPRANDOM=18255;export PS1=END:$TEMPRANDOM;/data/local/tmp/busybox cat /data/local/tmp/2752461.tmp > /system/xbin/su

END:18255export PS1=""

export TEMPRANDOM=23712;export PS1=END:$TEMPRANDOM;/data/local/tmp/busybox rm /data/local/tmp/2752461.tmp

END:23712export PS1=""

export TEMPRANDOM=73571;export PS1=END:$TEMPRANDOM;chown 0:0 /system/xbin/su

END:73571export PS1=""

export TEMPRANDOM=80448;export PS1=END:$TEMPRANDOM;chmod 6755 /system/xbin/su

END:80448export PS1=""

export TEMPRANDOM=15936;export PS1=END:$TEMPRANDOM;/data/local/tmp/busybox cat /data/local/tmp/8067377.tmp > /system/app/Superuser.apk

END:15936export PS1=""

export TEMPRANDOM=16161;export PS1=END:$TEMPRANDOM;/data/local/tmp/busybox rm /data/local/tmp/8067377.tmp

END:16161export PS1=""

export TEMPRANDOM=55330;export PS1=END:$TEMPRANDOM;busybox true

true: applet not found

END:55330export PS1=""

export TEMPRANDOM=52714;export PS1=END:$TEMPRANDOM;/data/local/tmp/busybox cp /data/local/tmp/busybox /system/xbin/busybox

END:52714export PS1=""

export TEMPRANDOM=34177;export PS1=END:$TEMPRANDOM;chmod 755 /system/xbin/busybox

END:34177export PS1=""

export TEMPRANDOM=69309;export PS1=END:$TEMPRANDOM;/system/xbin/busybox --install -s /system/xbin

END:69309export PS1=""

export TEMPRANDOM=17284;export PS1=END:$TEMPRANDOM;/data/local/tmp/busybox mount -o ro,remount /system

END:17284export PS1=""

I first attempted to unroot, but the system would get stuck on the first couple of steps then say that superuser was not installed so cannot unroot. My phone rebooted by itself and everything was fine. I then attempted to just root and override mine. The results above show it worked. When it got to "[+] Rush did it ! It's a GG, man !

[+] Killing ADB and restarting as root... enjoy!" <<that part, my phone turned off and did not come back on. I pulled the battery. Rebooted just fine and then plugged back in. That is when superoneclick continued with the remaining steps asking if i wanted to install busybox and if i wanted to test su. If someone who is not rooted wants to try this then please try. I attempted this four times and I did not get a brick. Although i will put up the notice that that is just me, and i took a risk to test this out.