http://www.afterapple.com/adam-knight/blog/2006/05/applecared-my-life-inside-apple-and-applecare A blog post of a guy's reflections about working in Apple's support division.

http://video.google.com/videoplay?docid=-2134266654801392897# Videos of three alkali metals reacting in water (for those who have forgotten chemistry, they explode).
http://video.google.com/videoplay?docid=-3795273284666354708# From the video description: Every New Year's Eve, a group of friends gather to light a pickle. 120 volts of house current is passed through a pickle to create a dazzling show of light, sound, and smell.

http://www.grocerylists.org/ People upload grocery lists they find on this website to reunite it with its writer.
http://infinitecat.com/ The infinite cat project: take a picture of your cat looking at the picture of all the other cats.

http://video.google.com/videoplay?docid=364674351776711190# A whistling belly button!
http://news.bbc.co.uk/2/hi/uk_news/magazine/4954856.stm Philosophical questions.

http://stellarium.sourceforge.net/ Freeware planetarium software!
http://www.thespacereview.com/article/613/1 The real story behind NASA's special space pen, be sure to read this. It turns out NASA did not spend millions of dollars to design a pen that would work in space.
http://video.google.com/videoplay?docid=-162891478515007486# A bike travelling 100 mph down a mountain breaks.

http://pixelfonts.style-force.net/ Free pixel fonts.
http://www.williams.edu/biology/explodingflower/movies.html Videos of dogwood flowers springing open and shooting their pollen into the air in slow motion.
http://www.greatervancouverparks.com/HARRISONSandCastles01.html Giant sand castles!

http://www.ninjanewyork.com/ A restaurant in New York where you are served by ninjas.
http://www.channelchooser.com/ Free TV channels streamed over the Internet!

http://www.damninteresting.com/eyewitnesses-to-hiroshima-and-nagasaki Eyewitnesses to the atomic bombings of Hiroshima and Nagasaki.
http://www.hemmy.net/2006/05/02/space-cube-smallest-pc/ The world's smallest PC, about 2 inches cubed, and has USB, Ethernet, and VGA. I think it's very cool.

http://www.youtube.com/watch?v=SbY0Jh9_RJ8 Amazing video of a car dashing through traffic, watch the rightmost lane.
http://www.youtube.com/watch?v=1G8_BbERk8o This is a video of what a store did to its 10000th shoplifter.

http://leoricksimon.blogspot.com/2006/04/telephone-fm-transmitter.html Instructions on how to make a device that will listen in on a phone line and transmit it over FM radio.
http://www.zeropaid.com/news/6384/top_azureus_plugins_revealed/ Very handy plugins for Azereus, a BitTorrent client.