I might do it even though I don't own an N900. I almost bought an N810 but then I spent the money I reserved for that on a Verizon HTC Vogue phone... If there was something else in it for me (i.e. if I had a N900 or if I was getting paid :P) you would probably be playing Mario Kart 64 on your phones by now. One thing that could delay or prevent me from doing it is the packaging situation. I've compiled and run Mupen64Plus for both an IPAQ and my phone (with Mario 64 running at 5FPS due to the 400MHz CPU and lack of 3D drivers in Debian for my phone, and the iPAQ is even slower), so porting it might not be hard for me, but at this point I'm lacking motivation and packaging skill (building the deb, distributing it, and dealing with all the support requests involved)... The other thing I'm not sure about is hardware - an N900 emulator would be really slow, and I have no hardware to test it on.