I got my Thunderbolt two weeks ago. Updated to the 7/8/2011 OTA. Still, the Verizon bloatware irritated me, so I decided to root, to delete it.
Well, I wasn't able to flash the OTA jcase ROM on my first round. probably my error.
But, I flashed DasBAMF 1.8.6 and the OTA 7/8 radios, and it worked well. So, that's what I am on until new hotness comes down the line.
My interests are balanced performance with battery life.
I even tried to flash improperly and got the warning triangle, but pulling the battery got me back up and running, and I tried again. Eventually it all worked. Follow the docs exactly, including the downgrade RUU, and you'll be fine.