http://www.slingcommunity.com/forum/thread/16960/Slingin--with-a-Bluetooth-Headset-FINALLY/

Here's a thread discussing this just a couple days ago..  Usually you can find what you're looking for with some basic searching.  There are some other threads on this too.   Search for bluetooth headset..

Slinging Tivo HD from a Pro HD, Tivo Series 2 with cable and DirecTV from a Pro, Tivo HD from a Solo, Humax DRT800 from a Classic to Sprint Mogul, Dell Inspiron 8600 with Sprint EVDO, and a SlingCatcher over Windstream DSL.