For Undergraduates:
Paid Summer 2011 Undergrad Research Placements:
Over 400 programs – REU and Other Summer Research Opportunities for Undergrads
http://www.pathwaystoscience.org/Summerresearch.asp
For Financial Support in Graduate School Opportunities:
Bridges, GK-12, IGERT and NSF Grad Research Fellowship programs provide generous stipend and tuition support for students through the National Science Foundation:
http://www.pathwaystoscience.org/Grad.asp
For Postdoc opportunities:
http://www.pathwaystoscience.org/Postdocs_portal.asp
For NASA-supported internships, fellowships and scholarships: