Search for Funding

http://www.grants.gov/:  Search all federally-funded grant and fellowship opportunities

http://www.cos.com/:  Search both federal and private grant and fellowship opportunities

http://www.scangrants.com/:  another search for funding, categorized by research topic

www.cdc.gov/od/pgo/funding/FOAs.htm:  Centers for Disease Control and Prevention

http://grants.nih.gov/grants/guide/index.html:  National Institutes of Health

www.samhsa.gov/grants/2009/fy2009.aspx:  SAMHSA (Substance Abuse and Mental Health Services Adminstration)

http://www.hsrd.research.va.gov/:  Veteran's Affairs

www.hrsa.gov/grants/default.htm:  Health Resources and Services Administration

How to find out if something's already been funded by the NIH:

NIH RePORTER (Formerly known as CRISP):  http://projectreporter.nih.gov/reporter.cfm