I'm using the bluesonic HS889 which is a stereo headset with hands free capabilities. The dongle has a stereo jack so you can swap in your higher quality ear buds if you so choose. It has a built in spring that easily clips onto dress shirts and T's.
It works great with the 6700 listening to music and switching over to picking up an incoming call and then switching back to music again. I've used them both with the "sprint clean and simple load" and the new kitchen load. Also, they work well with voicecommand and retails for between $49 or $59. I've seen them on ebay and sometimes you can order direct bluesonic.
http://www.huey-chiao.com/show.asp?id=33&pb_id=0107#
There is a problem with stereo quality and it's not the fault of the headset. The BT sterero sound appears to be very quantized (sounds like the first implementation of mp3 from years back). This has to do with the apache's BT stack (or I guess MSFT's stack). I know it's not a problem with the headphones cause I pair them with my laptop and the sound is amazing!
I highly recommend these headsets and I'm holding out for a better day when someone figures out these stereo bluetooth / quality issues.
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