This may not be helpful to your situation but I managed to monkey together my own wireless headset. I already own the Logitech wireless Xbox headset. So I took an old Xbox controller and converted it to a USB controller using instructions I found on the net. Then, I downloaded the XBCD and XBAudio drivers. A roundabout way of getting a wireless headset but certainly a very effective one using things I already owned.
If you don't already have these things then it's of little use to you but if you do, then it works extremely well.
http://www.logitech.com/index.cfm/pr...CONTENTID=9524
http://www.i-hacked.com/content/view/78/85/
http://www.redcl0ud.com/