The Wiibrew scene is really booming these days. If you want to get into the community, but you don't know how to get started, you should take a look at GRRLib from coder nonameno.

GRRLib is a development library that has a variety of functions which are friendly for those who are new to coding for the Wii. Nonameno also has several tutorials up for those who want to learn coding. There are also two sample codes available you can experiment with. You can view them after the source link below.

GRRLib was also the first development library to support the Wiimote. GRRLib is now on version 3.0 alpha, and no longer supports previous versions. The author explains that this is because they "didn't use a real full GX support."

Download: GRRLib. v3.0