Anyone who has played around with server 2008 and hyper-v would have noticed that you are not able to bind a virtual network to a wireless network adapter and more than likely (although i have not personally tested it) a 3g or other mobile broadband card. I guess the reason for this is that most people would probably not need to do this, BUT, I did.. after asking google, I found 3 ways around this, my preferred method is the last one.

Methods:

• Using ICS - see Ben Armstrong's blog
• Using RRAS - see Ken Schaefer's blog
• Using Bridging - see John Paul Cook's blog