Dude trust me, I have helped quite a bit folks on getting out of a "brick". From what I can tell the 2.17 Official ROM seems to be the one the phone likes to get out of a brick. Download it from the HTC Support website. Here is a link...
http://www.america.htc.com/support/m...downloads.html
Try this, reboot your computer without the 6800 connected. Hard reset on your phone. It will say its loading a ROM up but it ain't. It should boot into bootloader, then soft reset. Once computer is loaded up, disable your activesync USB connection on PC. Once done, connect your 6800 and it should pop up as Qualcom something a rather USB connection. Once that happens, double click the RUU .exe for the ROM you downloaded from HTC. Follow the on screen instructions. Don't worry about the activesync connection.
I know this is a Sprint ROM, but a Verizon user on another post I found said he used it just to get his 6800 working again, and then flashed a Verizon ROM.
Good luck man, it took me over a week of trials and errors, before I got it! I mean long ass hours of nothing and nothing.....