I would still probably buy any SunSoft WiiWare release, though frankly your Homebrew release has the potential to take off and have a life of it's own once you get the level editor (or better yet some kind of file format to make it more platform neutral) so people can create and trade their own patterns, as well as tilesets and backgrounds.

I imagine SunSoft has the potential of having some very cool downloadable content and music as well; good thing is I don't feel as deprived now (plus I still have the disc game to check out)...