Love Dodge Ball?

I found this interesting ad on Craigslist over the weekend...

Dodgeball Game XXXX
Who: You and your friends, or your enemies
When: Saturday, December 2nd, 2006
Where: Mesquite, Texas - Dunford Community Center (near 30 and LBJ about a mile down the road from Trophy Nissan) 1015 Green Canyon Dr, Mesquite Texas 75150
Time: 3 PM - 5 PM
Bring: Athletic wear and a sportsmanlike attitude.
Cost: $5

I think this is a great example of how the web is changing how people create community. I wonder how many people show up for this event for each game. How useful could/would this be for churches? After all Craigslist is free. Anyone using Craigslist to publicize your events to the public? Why keep your events all to yourself? Let everyone know.
Another useful tool is Google Calendars which now allows everyone to search your public events.
You can add events to your calendar and mark them as public and everyone can search for events in their area.
For example, I have encounter's worship services listed on my Google calendar and a search of Waxahachie will pop the event up on every Sunday. Tag it with a website in the description and who knows who might find your church because of it.