Wikipedia

http://en.wikipedia.org/wiki/Milk_bag In Canada, milk comes in bags.

http://en.wikipedia.org/wiki/Black_Rod Black Rod's job is to enforce proper conduct in the Parliament's House of Lords.

http://en.wikipedia.org/wiki/%C3%86thelred_the_Unready Wikipedia on Æthelred the Unready, King of England.

http://en.wikipedia.org/wiki/Lichtenberg_figure The tree-like shapes that electric discharges create. This is the kind of thing you see on lightning victims.

http://en.wikipedia.org/wiki/The_Ambiguously_Gay_Duo All about the Ace and Gary cartoons on SNL.

http://commons.wikimedia.org/wiki/Commons:Picture_of_the_Year Every year Wikipedia users vote on a picture of the year. Here's a list of the past results.

http://en.wikipedia.org/wiki/Pen_spinning Wikipedia on the thing people do where they spin a pen around their fingers really fast.

http://en.wikipedia.org/wiki/Southern_Tenant_Farmers_Union A New Deal group that regulated the supply of food in order to increase prices.

http://users.softlab.ece.ntua.gr/~ttsiod/buildWikipediaOffline.html This guy wrote a nifty program to index, search and display a local copy of Wikipedia.

http://abeautifulwww.com/2007/05/20/visualizing-the-power-struggle-in-wikipedia/ How Wikipedia article data was visualized to show activity.