PowerWave. My friend who worked in PowerComputing support says that riser card never really worked all that well though. The combo riser card had a name, and now I can't remember it. My old posts on the topic were probably at Powerwatch.com and that site is long since history, although there might be an archive.
I have an IR wireless mouse which works in either an original Mac (through Plus) or as an ADB mouse. However, it has a noticeable bit of latency, so I prefer a wired mouse.