I've just finished putting all of the info about biomes that we have into the wiki, so go check it out. I'll keep this updated whenever the main Biome list on the forums is updated. Also, I'd like to propose a "precipitation" factor to the biomes template. Precipitation is really the deciding factor between forests, plains, and deserts, so I think it should be included.
Other than that, keep thinking up biomes, we still need a ton, except for in the Open Ocean and Caves categories.