Information for Foundations:
GuideStar - reporting on U.S. nonprofit companies
GiveWell - recommends and rates impact
Giving What We Can - can get some individuals opinions
Center for High Impact Philanthropy - Univ. of Penn. - recommends and rates impact
Grantmakers for Effective Organizations (GEO) - GEO is a diverse community of 500 grantmakers working to reshape the way philanthropy operates.
Exponent Philanthropy (formerly The Association of Small Foundations) -
Chronicle of Philanthropy - (They also said they'd be an appropriate place to post a job description)
Places I should have posted my job description:
idealist - We connect idealists with opportunities for action.
also see "Chronicle of Philanthropy" above
Personal Giving:
Global Giving - Super fun crowdfunded giving site
Donors Choose - Teachers ask for stuff, and one can donate
Watsi - Fund a medical treatment
every.org - maybe a way to give to lots of orgs, even international ones from within the USA as deductible