Well, haven't you seen my "Bounce" music video? I custom did that Tails sprite... and the Knux drum set... And Dr. Ivo "Eggman" Robotnik's keyboard... I guess I'll make a custom sprite of myself, but all Sonic232 stands for is that I'm the 232nd clone of the REAL Sonic. Guess I'll have to think about it. Any suggestions would be cool. Almost done with my Sonic snowboarding video, BTW. Decided to put Shadow in there for the ending and have a downhill race :-P
By the way, I KNOW that there are 5 official Sonic universes (six, acutally, if you count the games), like you said, Adventures of Sonic, SatAM Sonic, Sonic Underground which IS different from SatAM Sonic, though the character designs are the same, Gaming Sonic, Sonic OVA (just a couple 30 minute episodes that make the entirety of a Japanese "movie" of sorts.) and Sonic X. All these timelines can be considered seperate from each other, though I know of a few fanfic writers DO mix them marvolously.
Once my accomplishment of a custom Sonic sprite is done, I shall let you all know what I am willing to do to assist in Sonic related projects. Until then, may your DBZ NEVER mix with your Sonic, so help me god...