I have had connectivity issues too - but I thought it had more to do with my new time capsule. Every time I finally get it to work it stops working when I shut down the computer and I have to find a way to get it going again when I start up again. Right now the light glows green but nothing is happening. I have rebooted and rebooted and no change.

However, I have been able to connect to a neighbor's wireless network - so I am assuming it isn't airport.