I have tried a couple of flash based G.I JOE games online. To name a few of them:

GI Joe A Tank Named Grizzly Game

GI Joe Combat Simulator Game

GI Joe Skyburst Game

I find them pretty amusing for being games that you play online. Do you have any tips for good G.I Joe games online? Or have you tried to the EA version of the game that came out a couple of years ago?