If you haven't all ready, you may also want to do some searches and ask around on the DUC:
http://duc.digidesign.com/postlist.p...lapsed&sb=5&o=
(EDIT: Just saw you posted on there!)
If the gig is in two weeks, I would definately recommend one of two things:
1. Buy a Mac laptop. If you absolutely need this to work, then this is a solid (albeit expensive) solution.
2. Start buying PCMCIA cards and trying them out (they're cheap!) Research your specific model of laptop. Try to find out if others have had success with it. Digi hardware is very finicky.
Time is of the essence, as with any system, there will be kinks you will have to work out. Never show up to the gig with a system you haven't tested many many times! I'm sure you're more than aware of that, tho. Get searching and good luck!