Howcast shows engaging, useful how-to videos and wiki guides. A few examples include: How to Do Polyphasic Sleeping, How to Make a Fried Onion Blossom, or How to Do a Frontside 180 Ollie. Founded by veterans of Google and Youtube.
posted by netbros on May 26, 2009 - 7 comments

He holds a degree in jam-making. His stepmother is a former stripper by the name of Kandy Caine. He once appeared in a Backstreet Boys video. He's Senator Julian Polonius Foley Marcos DeWiki III, and he's running for President. (more) (via)
posted by Horace Rumpole on Oct 8, 2008 - 22 comments

"Tired of the LIBERAL BIAS every time you search on Google and a Wikipedia page appears?" At Conservapedia, a "conservative encyclopedia you can trust," you can learn that "faith" is a concept "exclusive to Christianity," and about how Wikipedia is biased in matters such as its description of the Bell Trade Act of 1946, its gossipy treatment of the private life of NPR reporter Nina Totenberg, and its seeming acceptance of evolution. The Wikipedia bias entry also complains of a "rant" against the Association of American Physicians and Surgeons, a group for which Conservapedia founder (and son of conservative gadfly Phyllis Schafly) Andrew Schlafly has worked. Signups are here; its take on evolution is criticized here.
posted by ibmcginty on Feb 23, 2007 - 153 comments

Wikipes is another application of wiki. Everybody go in, put in some of your favorite recipes, and cook dinner for your sweety. Thank me later.
posted by mychai on Jan 28, 2005 - 21 comments

Tiddlywiki looks fantastic, but the idea's so cool I'm still not sure what I'd use it for. So far, there's a only a tiddly hypertext story. Bears watching.
posted by iffley on Sep 27, 2004 - 7 comments

Homestar Runner Wiki — People who like this sort of thing will find this the sort of thing they like. Fhqwhgads!
posted by jdroth on May 19, 2004 - 15 comments

Wikipedia is a free on-line encyclopedia that allows users to write entries about nearly any topic. MSNBC's take on it can be found here.
posted by ttrendel on Sep 29, 2001 - 8 comments