[Galaxy Tab  Android Development] EngineerMind:
OK - this worked great - here are some things I did/figured out that may help the next user...

1) I was running the stock froyo rom that came with it when I bought this Sprint Tab from Woot.com a few months ago. The cool thing about this sprint tab vs. wifi only tab is that it has the sprint radio in it, so even if you done have a sprint account, android can use the cell-towers to give your rough "location" if you want to turn GPS off for provacy reasons.

2) I rooted the stock froyo rom and installed the wpa_suplicant so my tab can see ad-hoc networks (my HD2)

3) For the last week I was getting the pop-up "A system update is available....Install Now?" - so it seems it downloaded the GB update and wanted my approval every 10 minutes (very annoying), but I didn't give it the OK because I feared it may brick my tab because iI rooted it. So I just kept clicking "not now".

4) I had many apps/services disabled (using autostarts) and frozen (using titanium backup) and had a few startup tasks running with tasker. I enable all the disabled app, defrosted all the frosted apps and disabled tasker's tasks - I did this so as to not chance any conflicts with the new OS when it boots up for the first time (if this upgrade went well).

5) I downloaded the file in the first post of this thread and extracted its contents - a copy of "odin" is included in the downloaded RAR file so you don't have to track a copy of that down :)

6) Just followed the instructions and within 3 minutes I had rooted GB spring galaxy tab!!!

Some things I noticed with this new ROM:

A) ALL my apps were still installed and seem to be working fine - this update does not seem to trash anything!

B) I was getting severe random "hangs" with the older froyo build - it seems the problem was with "writes" in the quadrant benchmark - file i/o writes and database write tests took forever to complete which gave me like a 400 quadrant score. In other words, many times (like every 5-10 minutes) my tab whould just freeze on me for about 30 seconds, then come back to life. This update seems to have fixed that issue - I now get like 1350 score!

C) Root explorer works just fine - I had no problem installing the wp_supplicant file into \system\bin to get my tab to see ad-hoc networks.

D) Titanium backup is working just fine.

E) I could never get any of the netflix APKs from all over the place to work (including the one in this thread) with the older froyo build, but the APK in this thread works just fine with this GB build!

F) I did notice the red x in the battery icon after the upgrade while connected - this is because our galaxy tab needs A LOT of juice to properly charge itself. You will notice that the ac adapter that came with the tab is rated at 2 amps (2000 milliamps) - the normal current ouput of a normal USB hub/pc port is only a few hundred milliamps (varies widely with different USB hubs/pcs). Even though your USB port may squeeze its way to trinkle charge your tab (which will be much slower then using the ac adapter that came with the tab), the newer OS seems to have a new "too low current" warning (the red x) that the older froyo system didnt have. So, nothing probably has changed (it will probably charge yout tab the same way it used to, but then again maybe not if this new warning system also disables the "charge mode" of the tab - testing is needed to make sure), but now its tells you the current it sees coming into the tab is not really the recommended amount.