This site is amazing... it's one of the greatest projects ever created on the Internet.

Wikipedia is a free online encyclopedia. What is so amazing is that it is created by anyone and everyone. Know all about cats? Just pull up the wikipedia page on cats and click the edit button. You can add, edit, or delete any of the information. Everyone works together to build the "perfect" information page on a subject.

It sounds a little chaotic, but it works out rather well. The quality of the writing after enough people have edited it is superb. Also, you can find topics that go way beyond a traditional encyclopedia, and topics that are current. For example, there is already a Hurricane Katrina entry at Wikipedia.

The other great thing is that Wikipedia documents are not 'owned' by anyone. They are listed under something called GFDL - Gnu Free Documentation License. That means you are free to use the content with minor restrictions. (This comment is only provided for information purposes - you should read the actual license agreement on the Wikipedia site before you use anything from there.)

Anyway -- check this site out. It's really an amazing project and is fast becoming one of the best and most popular sources for research on the web.