I found it by googling for "three wheel motorcycle". However Wikipedia doesn't seem to know what a Spyder is except as a "Roadster," which in turn it says is a kind of car, and it doesn't know what the "Can-Am" company is, it claims it's some kind of race thing.
How can so many people be buying these things if they can't look it up on Wikipedia? :)
Edit: Ahhh, i needed to look at http://en.wikipedia.org/wiki/Can-Am_motorcycles, which points to http://en.wikipedia.org/wiki/Can-Am_Spyder. Clearly someone needs to update the "Spyder" disambiguation page though.