The chip set from Intel used in the 8700 supports this functionality in the hardware. This was confirmed by RIM and Cingular to me yesterday.
On a separate note, RIM has posted the following on Bluetooth compatibility. It will be updated as it has some shortcomings that I have communicated already to RIM management. However, it is a start!
http://www.blackberry.com/knowledgec...?nodeid=858763