Looks like the Big Red is getting ready to rollout Android 4.0 (Ice Cream Sandwich) software update to HTC Thunderbolt customers soon. An official fully functional Android 4.0.3 ROM has been leaked to Team BAMF build version 7.00.605.2. If you want to test this ICS build ahead of VZW scheduled upgrade, feel free to check team BAMF forum.
This is a deodexed stock ROM the only modifications made by BAMF “includes root (ChainsDD Superuser and an unsecured ramdisk) and all of the HTC spyware has been removed.”
“Everything in this ROM functions including 3g/4g, phone calls, sms/mms and more. HTC has been nice enough to include Sense 3.6 which is quite the upgrade from Sense 2.1.”