MentorNet is a national organization that matches science, technology, engineering and math students with professionals in those fields. The UW System recently regained access to the program, thanks to a grant from the USDA. Although they are particularly interested in reaching students from groups traditionally underrepresented in STEM fields, including students from rural communities, all UW System students (undergraduate and graduate) are invited to participate.
A student who would like to be mentored can learn more about "becoming a protege" at http://www.mentornet.net/Protege.aspx
Tenure-track faculty in STEM fields can also sign up as proteges, to be matched with a senior faculty member at another institution.
Faculty and academic staff members are invited to become mentors for students and/or tenure track faculty members; find out more at http://www.mentornet.net/Mentor.aspx