Here's my set-up: I have a 13" aluminum MacBook and a 13" MacBook Pro on an AirPort network. The AirPort network is in WDS mode with a 1TB Time Capsule as the main and an AirPort Express as a remote. When I open the Time Capsule settings in AirPort Utility and look at the Wireless Clients box, there are 3 wireless clients, the AirPort Express (802.11b/g), the MacBook (802.11a/n) and the MacBook Pro (802.11b/g/n). I understand why the AirPort Express is b/g, since it's an original model and N wasn't available at the time, but why the difference between the two MacBooks? What's the difference between a/n and b/g/n and why are do the two essentially identical (from a wireless networking standpoint) computers have different setups?