Americas Business Funding Directory - As well as providing information on obtaining venture capital funding, there is a searchable database that can be used by those in search of venture capital or by those seeking companies needing capital.
BanxQuote - for up-to-the minute information on interest rates
Money-Rates - offers the latest rate data for mortgages, credit cards, automobile loans, home equity loans, and small business loans.
The IRS Digital Daily - a plethora of IRS related information and forms. Also provides a way of filing your taxes online.
1040 Express Tax Search Engine - Links to tax related sites. Download federal tax forms or file your taxes electronically.
The US Tax Code - Search the US tax code by keyword or select a topic from the index. It loads very slowly, but it will give you the definitive answer since it is the root source.