Just a heads up, you might want to take a peek at the changes that have been made to the VBA-M core in VBA GX. Some of what's been worked on is: rotation/tilt sensors (using the wiimote!), solar sensors, rumble, RTC, custom Game Boy mono palette support.

Obviously you can just pull what you want and implement it however you want, I just wanted to give you the heads up that the code was there.

See the commits here, from March-May: http://code.google.com/p/vba-wii/source/...source/vba

The solar sensor and RTC implementation is the most important part.

Depending on my mood, I might look at what you did, or others can do the same if I don't get around to it.