guys on another post i email htc directly to ask. here was the response
Dear jordan,
Very good question, Jordan. I would be more than happy to provide you with a little more insight.
At this point in time, HTCSense is still undergoing further development and testing. We've run into major problems that will probably not be fixed before the Thunderbolt is released; this is why only two phones, thus far, have the necessary version of HTC Sense to work with the site. We feel that the site is not stable enough to handle the additional traffic. Due to this, the Thunderbolt most likely will not initially be able to interface with HTCSense.com -- Once the site is a little more stable and able to handle more traffic, and once we've worked the bugs out of it, we'll be looking to expand the list of phones that will work with the site. As the Thunderbolt is going to be among the first of Verizon's 4G phones, I can only guess that this phone eventually would be made compatible -- however, this is something that is left up to Verizon. We would be more than happy to forward this suggestion to the people at Verizon, so that they know that people looking forward to the Thunderbolt would like to be able to use HTCSync.com.