The following sites are very good sources for investment related information.  All of the sites are free, although some require you to register. 

Business News Sites

CNN/Money                 http://money.cnn.com/

CBS MarketWatch       http://www.marketwatch.com/news/default.asp?siteid=&avatar=seen&dist=ctmw

General News Sites

Washington Post         http://www.washingtonpost.com/

New York Times            http://www.newyorktimes.com/

Business Magazines

Business Week            http://www.businessweek.com/

Forbes                            http://www.forbes.com/

Stock Information

Yahoo Finance             http://biz.yahoo.com/p/g/ge.html

MSN CNBC                  http://moneycentral.msn.com/investor/research/welcome.asp

Stock Charts

BigCharts                      http://bigcharts.marketwatch.com/interchart/interchart.asp?symb=spx&draw.x=0&draw.y=0

Historical Prices

Yahoo Finance             http://finance.yahoo.com/q/hp?s=GE

Mutual Fund Information

Morningstar                 http://www.morningstar.com/

Bond Information

Bond Market Assn.     http://www.bondmarket.com/

Smartmoney                  http://www.smartmoney.com/bonds/

Personal Finance (Retirement Planning)

Kiplinger                       http://www.kiplinger.com/tools/

Smartmoney                  http://www.smartmoney.com/pf/

Tax Information

IRS                                 http://www.irs.ustreas.gov/

Earth View                 http://antwrp.gsfc.nasa.gov/apod/image/0011/earthlights_dmsp_big.jpg