HTC's Portable Bluetooth Conference Speaker
As accessories go this one's rather specialised, but you don't have to use it as a conference call speaker - it works just fine as just a speaker. That means movies, music, what-have-you's, can be played through it, and that versatility makes the price a little more palatable. It's not available yet, but you can pre-order through Expansys.
"A planner is a gentle man, with neither sword nor pistol.
He walks along most daintily, because his balls are crystal."