:p Well, before RS-X and all (this was early 2000), people always called it "actorslash", because the possibility of musicianslash didn't seem to occur to them. (Will spare you further theorising, but suffice to say the RPS and FPS worlds were very much separated back then.) The first handful of posts on RS-X still call it "real people slash" or "realpeopleslash", and I'm fairly sure I coined the acronym when I wrote the FMO.

I AM NOT A DEVIANT!

Oh, and O-Town? No clue, as I didn't get into popslash until late (like, late December) 2000, early 2001.