Just as a quick note, the only exterior difference between apple wireless keyboards, that I know of, is the number of batteries needed.

I have a 3-battery one, and it connect to the N9 but then flashes, and does not work, not even following this tut: http://forum.meego.com/showthread.php?t=4828
I get to the point of hidd --search, it lists a MAC, but then fails.

The same kbd does not work on my N900 even after fiddling a lot, and following every procedure known to man.

I know that there are 4-batteries and 2-batteries versions of the keyboard, the latter being the newer.

The few people that managed to use N900 with the apple kbd that I know of, had the 2-battery version.

If you have the opportunity to try with a 2-battery one, or generally, with a new keyboard, it may work.. keep us informed!