I am doing that, yes. Currently using my Dualshock 3, though I'm gonna get a Raphnet GC -> USB adapter sooner or later, I'll assume that will work as well.Are you guys playing melee on dolphin emulator with the controller rumble function enabled?
EDIT: Also, just a warning to anyone I'm playing in the future. I'm a huuge newbie to competitive Smash. I didn't even know about teching (which isn't advanced stuff at all) before this last weekend, but everyone's gotta start somewhere!