Wikipedia is a pretty neat website. The idea is to build an online encyclopedia that can be changed at any time by anyone. The amount of information that the site contains is mind boggling. You can spend hours cross-linking from entry to entry. By allowing users to view previous revisions of each entry, it seems that fake entries are quickly corrected back to a more accurate definition. I think the idea of an encylopedia that draws on the knowledge of the entire internet community is great concept. Although their servers tend to be a bit slow, it is well worth a visit.