I have tried it with the 360 controller, but I've not been able to get a strong, constant vibration from it - certainly not enough to cause an orgasm.
Same here, only with a PS2 controller. Anything causing vibrations in a video game isn't going to last long enough to get you there, unless perhaps you can manage to play an explosion-heavy game with the controller held to your crotch the whole time.
No, but I have use a motorized toothbrush (new and never used in my mouth) got super horny at work, went to a store and picked one up, the back side of the brush worked good for a clit vibe and got the "job" done.