I'm a pretty big fan of wikis (not sure of the plural form) and of Wikipedia. I find myself using Wikipedia all the time now - just recently researching EV-DO wireless technology.
At the same time, working in an educational environment, I also hear a good deal of discussion regarding the reliability of information found in Wikipedia.
In this article, Andy Carvin takes a unique approach to introduce Wikipedia to his students and in my opinion, helps sustain and support it.
During my trip to Madison WI, I took a little time to hit the Lake Mendota. I was only out for about 1 hour, but it was fun.
Here I am coming out of the corn in Dyersville IA. Not sure it is heaven, but it was fun.