Fraud in supernatural claims: James Randi
Check up on businesses: Better Business Bureau
Give responsibly to charities: give.org
Legal Issues: Findlaw
Medicine: WebMD
The MIT AI lab
Web development: W3schools--HTML, XML, SQL, Flash, javascript, VBscript, etc...
A Visual Basic tutorial--annoying if you know how to program but a good overview of the IDE with lots of source code
PHP--everything you wanted to know, plus all the software downloads
Computer virus information: Symantec
Electronics, Computer Science, much more: How Stuff Works
Nasa's page on warp drive
Undergraduate Mathematics
Evolutionary Biology: Talk Origins
Developmental Biology links:
The Hall of Ma'at: a defense of the mainstream view of history
Mythology: God-of-the-month Club