Just to let everyone know, I bought one of these for my 08, it plugs into the aux, I bought a 6" ext cable from radio shack because the lid wont shut if you dont. You can charge it while it is plugged in. It works very nice, good quality audio and is not all that expensive.
Works with all phones not just HTC.
http://www.pocketables.com/2012/05/h...at-sprint.html