The issue I'm having right now is that my Mac doesn't get an IP address from the Windows ad-hoc wifi connection and therefore can't access the internet. I've turned on Internet Connection Sharing (ICS) for the dial-up network connection and AFAIK hav created the ad-hoc network correctly....

Ugh... It also takes forever to connect to the ad-hoc network. It's instant for the one I created on teh Mac last night.