I believe Freedom Force had a very limited online play mode which more or less was just head to head team combat. Not even close to an MMORPG but the only thing even vaguely similar at the moment.
At this point I'm pretty much set on the fact that the Marvel game (2005 right?) will be hitting before City of Heroes ever gets released. I can respect that a game needs tweaking and playtesting to get things finely tuned but they really messed up in announcing CoH so early. It seems like the beta test has been delayed several times over, let alone any sort of actual release for the game.