Got my beauty on Saturday. After some MyTouch glitches (a reset helped--and if you want to sync a Palm Treo, but your phone in temporarily visable and let Sync find it, not the other way around).
One odd thing that happened once... after setting my destination, the radio came on. While this appears liek a glitch, the sound system probably needs to be on for voice directions. Gotta say, Microsoft didn't make this the best system in the world.