Alley Cats are Bike Messenger races where you show up at a location, you are given a list of addresses, the first person to reach all the destinations in any order wins. Sprints are drag racing.
I'm more inclined to put them on my flickr account and allow others who like them to do the rest. Link, steal, modify, etc. I'd prefer if I get credit for them instead of someone trying to pass it off as their own work, but I think the desktop size I put out more than takes care of that.
