I've been using a "Windows 2008 Workstation" (google it) on my laptop. I am aware of the workarounds to get Hyper-V to work on a wifi card.
But I'm wondering if Server 2008 R2 adds this capability? Seems like something there would be some demand for.
Judging by an article by msdn's virtual guy, they are not introducing this in R2. The article explains some of the hoops he has had to go through on a laptop running R2.