Snakeoleo (low fat is good),
You can go into the *my space* and edit your name to be "Snake Oil" in here. Your forum name doesnt have to be your ebay username and well actually, most seem to think its a good idea for it NOT to be the same as your ebay username (that may just be paranoia though )
I would be very surprised if we already had a SnakeOil in AS, and if we did you could just funk it up a little with some ~~ or **'s.
It will save you from being called *Leo* in the future.