Here's what the HTC letter had to say:
Dear Adam XXXXX,
I understand how important it is for your Thunderbolt to function properly and I apologize that you have been experiencing rebooting of the device. HTC and Verizon are aware of this issue and an update will be released soon that will address the reboot issue, and bring the Gingerbread 2.3 upgrade on board, as well as several other enhancements. Although I don't have an official release date to provide you, this update will be released soon. Please monitor our website for further information as the release date moves closer.
To send a reply to this message or let me know I have successfully answered your question log in to our ContactUs site using your email address and your ticket number xxxxxxxxxxxxxxxxxxxx.
Sincerely, Jessica
HTC Want to see what others are saying? Have a question to ask other HTC fans?
Great news indeed. Now let's just sit tight and wait for the update to be released.
source: Ubergizmo