I also check Digital Cities every day. Select your city, then go to Shopping and Services --> Travel and Booking. You'll get listings of cheap airfares to various destinations, with carrier, including weekend "e-fares." I don't know if this is an automatic feed from some reservation system, or if there's a human editor involved. I also don't know how fresh the fares are. I have, however, used it to find cheaper fares from regional airports serving my metropolitan area.

It's easier if you go to the specific page you need then bookmark it for daily reference.

Mike