I have them and like them. I use them mostly at the gym. Some folks don't like their fit and others have had issues with them cutting out at odd time.

There are threads about them either here or Crackberry in the Bluetooth subforums.

Someone posted that they are now available for about $50 from tmobile, if I recall.

I use them with my 8830. I gather you need the latest OS that supports some protocol for Stereo music whose terminology escapes me.