I've spent the last 8 months having to go wired on my MacBook because I was abroad and finally got back to the US and my own wireless network. However, Apple programs such as Mail, iTunes and Safari are no longer able to connect to the internet. iChat though, can. I've long since used Adium and Firefox and can get online without a problem, but while Mail doesn't download/connect, Thunderbird does so without a problem. I set up an encrypted network through an Airport Express and played with those settings. Encryption on/off, ranges, channels, etc. I've also another open wireless network within range, and they don't work through that either. Everything is updated so far as I know. The Express got new firmware when I booted it in too. X.4.10 and TimeWarner cable.