Electronic

Beat Nation

on Spring 2010 Wednesday 9-10am, Summer 2010 Monday 3-5pm, Fall 2010 Wednesday 8-10pm, Spring 2011 Sunday 6-8pm and Spring 2012 Monday 6-8pm.
House
Trance
Drum and Bass

The Radio Show at the End of the Universe

DJs: 
kevin
on Winter 2010 Thursday 2-4pm, Spring 2010 Thursday 2-4pm and Summer 2010 Thursday 3-5pm.
Trip hop
Ambient
Experimental Jazz

Electric Confetti

DJs: 
zara
on Winter 2010 Monday 9-11pm, Spring 2010 Wednesday 9-11pm and Fall 2010 Thursday 8-11pm.
Electronic
Bass
House

Foundation

DJs: 
Jenn Louie
on Summer 2010 Wednesday 3-5pm, Fall 2010 Tuesday 3-5pm, Winter 2011 Wednesday 4-6pm, Spring 2011 Wednesday 3-5pm, Summer 2011 Wednesday 3-6pm, Fall 2011 Wednesday 3-5pm, Winter 2012 Wednesday 3-5pm, Spring 2012 Wednesday 4-6pm and Summer 2012 Wednesday 4-6pm.
Electronic dance
House
Club

20 Minutes into the Future

DJs: 
SK101
on Winter 2010 Wednesday 2-4pm, Spring 2010 Tuesday 1-3pm, Summer 2008 Thursday 12-3pm, Summer 2010 Thursday 9-11pm and Winter 2011 Monday 2-5pm.

some links for Philadelphians:

Electronic Eel records
Plastic Operator
KiloWatts and Vanek
The Galaxist (and all of 8-bit collective)
8static (chiptune promoters)
Gaian Mind (psytrance promoters)
JHN RDN's DJ edits
611 Records

Electronic
RPM
House/Trance/Techno