I have Plantronics Voyager 510 bluetooth headset
How can I listen to the mp3s through my headset ( I don't mind mono )
or can you use any other BT headset?
P.S. I heard this headset can be also used with the regular BT computer too?

I just got one as well beause of the ability to use it with my office phone with the headset system accessory. However, I haven't been able to get any audio other than phone calls to it, including not being able to use MS Voice Command.

All of this works fine with my other bluetooth headset. Has anyone gotten this to work?

I use a Motorola H500 headset, have Voice Command and the standard Windows Media Player. I use WMP to stream MP3's (that I've copied to my storage card) via my headset. I simply push the talk button on the headset and either use VC to open WMP or I manually open WMP and push play. The song plays and the sound comes through the headset without any trouble.

yea, that's how my other headset works. Unfortunately that isn't how the Voyager seems to work.

I have the 510 , i simply hold the talk button for about 2 sec and my mp3's come though.