I'm reading about setting the RADIUS server up in Windows 2003. This type of set up would be fine for us, but I'm concerned about wasting time just to see it fail with our junk hardware.

I'm slightly tempted to get an Airport Extreme, but it has a list of features that I regard as fluff. Guest Networking, Printer sharing, and Disk sharing are things I don't need (and maybe don't want). $180 is a tough sell. $150 for a refurb isn't much better.