NASA just received funding for Spring 2013 internships at 10 of their facilities nationwide, including Goddard in Greenbelt, MD.  This is an excellent opportunity to gain full-time experience for January - May, 2013. 

To apply, visit: https://intern.nasa.gov/solar/web/students/login/
Create a profile and submit the necessary documentation.

Requirements: US Citizen with 3.0 GPA, majoring in Math, Computer Science, Engineering or a Physical Science

IMPORTANT: Students do not specify a specific internship program when they submit an application. The NASA Education community will determine which internship programs you are eligible for according to the information you provide in your application. Students identify specific opportunities of interest, but not specific internship programs.
National Internship Programs available through OSSI:

Achieving Competence in Computing, Engineering and Space Science (ACCESS)
Motivating Undergraduates in Science and Technology (MUST)
NASA Science and Technology Institute for Minority Institutions (NSTI-MI)
NASA Tribal College and University Project (TCUP)
National Space Grant College Program (Space Grant)
Undergraduate Student Research Program (USRP)
University Research Centers (URC)
NASA Academies