GarageSpin

I was recently wondering if there was any kind of free list of college radio stations available online.  There are probably several, but I just happened upon the Indie Friendly Radio Database which lets you filter by several categories, including 'college radio', internet radio, geographic location, media type...though not simultaneously.

Though not perfect, it's actually quite a good resource. If you're in a band that's doing some old school, offline promotion (i.e. trying to get radio airplay by submitting LPs or CDs), be sure to check it out.  I'd suggest a couple things:

• Create a Story - The more interesting your story (or your band's bio "hook", the more likely some DJ will be interested in you, and give your music a listen. 
• Start Local - Hey, who doesn't like to promote home-grown talent?  Try your alma-mater schools and stations, past places of residence, etc.
  
• Contact a Human - Try to strike an email or phone exchange with one of the DJs or station administrators first.  The smaller the station, the easier that will be.

Good luck!