Here are some links that we have found useful in our work.

Small Business Resources

U.S. Small Business Administration advice, information from the U.S. Government.
Small Business Innovative Research program (SBIR) provides information on funding research and development projects.
Small Business Innovative Research program (SBIR) Wikipedia entry with links to several U.S. Agencies providing funding.
Funded Research Opportunities at COS
National Science Foundation
National SBDC Research Network information for entrepreneurs, hosted by SUNY.
Research Institute for Small & Emerging Business formerly The Small Business Boundation of America.
Hoover's Online gives information on companies.
Small & Home Based Business Links - mostly home based business information.