It's in perfect working order, as far as I can tell - don't have a program to check key presses so I couldn't check out the function keys, but typing etc. works fine on my iBook. Not sure if num lock is working - it doesn't light up or appear to do anything - but I'm not actually sure what it's supposed to do on a Mac. Can anyone tell me? Or point me at an OS-X program that'll check if everything is working?
Once I'm sure it's fully operational I've got to decide if I want to keep it - I've already got a Bluetooth keyboard and never seem to use it, and I don't really like the Apple "press the whole top down" single-button mice - I much prefer a two-button and wheel design. eBay is probably the best answer, I suppose, or I could keep it in case I do eventually decide to go Mac completely, but that isn't likely any time soon.
Decisions, decisions...