Airport express + PC
Ok, I have my Powerbook working like a charm w/ Airport express, but I am trying to get my roomates Dell hooked up to it as well so he can stream his iTunes as well. He has a linksys router and receiver. I installed the airtunes and airport software, and airport express setup assistant, and even the airport 4.0.1 update. It still won't connect to it. Any tips or tricks? What am I doing wrong? I have tried forever, and can't get it. Someone please be bored enough to help me out.

Comments
the pc have a wifi card as well ?
If you each have your "own" modem, then he will need to select the APExpress network before he can use airtunes. (his WiFi card can only access one network at a time.)
...And only one computer can stream music via Airtunes at a time. iTunes can be running on both, you just can't try to stream with both at the same tme.