CNNfn (http://cnnfn.com/)
The latest financial news from CNN. 

InvestorGuide (http://www.investorguide.com/)
Has a weekly newsletter on investments, an answer center archiving over 1,000 questions, as well as links to information on mutual funds, bonds, and personal finance. 

Money Magazine Online (http://money.com/)
Get a hyperquote on your stock, learn more about your company, and get the latest investment news here. 

The Montley Fool  (http://www.fool.com) The goal of this site is to educate, amuse, and enrich investors eager to take control of their finances. 

NASDAQ (http://www.nasdaq.com/)
NASDAQ. 

New York Stock Exchange (http://www.nyse.com/)
The New York Stock Exchange. 

Wall Street Research Net (http://www.wsrn.com/)
Lots of resources, services--like the ability to check account status and credit card information. Be sure to check out Grant's Interest Rate Observer Online. 

What Every Investor Should Know (http://www.sec.gov/consumer/weisktc.htm)
Provides access to a handbook from the U.S. Securities and Exchange Commission.