I’m hesitant to call this fixed yet, but I’ve had a little bit of progress working through an airport problem I’ve been having. Rather than re-iterate, I’ll link to the apple thread where people are chronicling their problems:
This has been infuriating (and an open issue for at least 6 months). I have swapped out routers, changed every configuration I could think of, etc.
Finally, I forced my router into 802.11g only mode (instead of b/g or n) and it has been working for a few minutes at least.