When I was a sophomore in college I stumbled across a radio program called the White Horse Inn. It's hosted by some professors and pastors who hail from the reformed camp, and I always find myself invigorated and educated when I listen to it.
They post each program on the web now, and I strongly encourage you to check them out at www.whitehorseinn.org.
They also produce a periodical called Modern Reformation that I find very uplifting and helpful.
Let me know what you think!