So, I’ve been deploying wifi on older Macs for my extended family. Here’s what I’ve found… A TrendNET TEW-403PIplus (or TEW-403PI+) works fantastic in a stock beige G3 PowerMac with a revision A motherboard (OK, we suped the G3 from 266 up to 300). I’m also looking to add USB 2.0 and firewire to this machine, so I bought a revision B ROM for it, and that works with the TrendNET card as well.

For my mother-in-law and administrative assistant at work, I popped a hardware version B1 DWL-G122 USB wireless adapter (with Ratoc driver) into their G3 iMacs, and their both chugging away happily now.