Audio Lectures by prominent speakers
If you want to take a break from reading,
islam audio and video
Audio/Video section of Islamicity
Muslim Radio Stations on the Internet
Radio Islam is run by Soundvision.
ISNA has a few programs. Check out isnavision. http://www.isna.net/vision/default.asp.
How about a short comic break? Yes there are American Muslim comics. For example, www.azhar.com