Wireless woes
Several different wireless connection issues are plaguing users, but so far only one of the issues has a fix. If you aren't able to connect to your wireless network and you're using a Westell Versalink 327W router, then that's the problem. The Intel iMac doesn't seem to be compatible with it, so you'll need to switch to one from a different maker.
This was off of Cnet. I wonder if it is the same with macbook?