A while back found the meetup.com group OSM-Colorado.
A few weeks before that I had learned that pretty much all of Park County Colorado was way messed up on OSM. I decided to join the group.
We met up in Idaho Springs Colorado and about a dozen of us split into teams of one or two people and mapped the entire town in just about 2 hours.
The next week we met at MapQuest HQ in Denver and started putting our edits into OSM.
This is how I met Hurricane and Steve... Great people!