Yeah, not to be rude but I've never intentionally waved to anybody from my bike and I can't think of a single time that somebody's waved to me since I started riding. I have waved to people I was hopping off the bike to see, and occasionally I'd give a wave to a friend just to tell him that I'd probably tie in with him a block down... but waving at random cyclists would seem a touch insane... considering that one of the routes I take daily features more cyclists than cars by leaps and bounds, and there's lengthy periods where I'm weaving through cyclist traffic (lots of people don't understand staying left or right... or... it seems safer here to assert in traffic than to take the bicycle trails on some days.