Wikis

Wikis are a great idea. I liked the one for the SDLA 2009 conference. It's a great idea for those who want to attend to see the schedule and info about it. Also the Rapid City Flood of 1972 wiki is neat. You could add a memory about the flood if you had access to the page. Wikis are very similar to Google Docs where you create a document or page and you can invite others to view or make changes.