please help: airmac and ipod mini questions

two questions:

I have two notebook pcs in the same house

17" pb
-and-
thinkpad with windows xp

i want to use one airmac to share the internet over both pcs....

the 17" pb has built in wifi so no problem but what shud i / can i use on the thinkpad ? i'll need some sort of pcmcia card but from apple or a 3rd party?

2nd question: i want to use an ipod mini with one of those iTrip2 things to play iPod over the radio....gonna work?

thanks for any help....