Here are a couple of web sites that you may find of interest:
Amaztype: A visual keyword search of Amazon
Babelfish: Altavista's free online translation service
HopStop: Helps you to navigate public tarnsportation (currently, only NYC)
Newseum's Frontpages: The front pages from about 400 newspapers from 42 countries. Also, find links to newspaper sites at OnlineNewspapers.
The Onion: Like the news, but not.
Netflix: Rent DVDs online and receive/return through regular mail. Also, Blockbuster.
Google: Best search engine, plus has a lot of other services, such as Froogle and Google News
Yahoo: get an e-mail account, website, play games, look for a job, shop, see your horoscope, etc..
PayPal: Send/receive money, make auction payments, etc.. via e-mail.
Hello.com: Share pictures online, like instant messaging.
MapQuest: Get driving directions. ALso, see Yahoo!Maps.
Kodak Gallery (formerly Ofoto): Create online albums you can share.
Dictionary.com: An online dictionary, duh! There's a thesaurus as well. Also, try Encyclopedia.com.
Amazon.com: Buy/Sell stuff, get product reviews, make a customized gift registry, get FREE music.
Weather.com: Get weather forecasts for your area, or any area.
Fandango: Buy movie tickets online, get reviews.
TVGuide: Your guide to television.
Snopes: Research urban legends, like that e-mail warning you just received.
HowStuffWorks: It's all about... um... how stuff works.
CitySearch: A guide to city living, dining, entertainment, music, events, etc..
ComingSoon: Information about upcoming movies. Also, see Greg's Previews.
WebMD: Health information. Shouldn't that be "illness information"?
Expedia.com: Book a flight/hotel/car, or just get travel ideas. Also, Orbitz, Travelocity and CheapTickets.
BabyCenter: LOTS of pregnancy/baby/child information and resources.