I was referring to Maemo and previous hardware and not just the N900 (sorry).

The devs that made the emulators for Android found a way to use C+, but they still have to use some resources through the byte code translation layer.

Still, they run waaaay better than a Java version would. If you search Youtube, you will see how great games run on Android based emulators, so Maemo and the N900 should run through them all like warm butter