T-Mobile is pushing update for my rooted Vibrant. Now what?

I rooted my Vibrant and installed Team Whiskey's Froyo, and have been pretty happy.  Far better than what I had before.  Now I've this constant icon (up at the top) that, when I do the drop-down, wants me to allow T-Mobile to update my phone.

I assume their update won't be as good as what I have now.  I'd like to make that little icon go away.

So, I'm posting here, asking for advice.  Among possibilities:

1.  Just learn to ignore that little icon.

2.  Odin my phone back to stock, then accept the new update from T-Mobile, then see if I like it, and if not then root and re-install Team Whiskey's OS.

3.  ???

Thanks.

 

drewdude007:
Already had Titanium Backup Pro, but without your help would have had no idea how to use it to fix this particular problem.  Thanks!!!!!