Bad Alternator?

Thanks for the advice all. I should mention that for the past several months, the cranking power seemed to be getting lower. I wish I had checked the volts on my battery before it died, oh well. I last drove the car on Friday night, seemed to drive fine. I had the heater, headlights, and wipers going. The alt guage seemed to be charging a bit more than normal, but I figured that's because I was running almost everything at once. Thanks again for the help, I'll update this thread once I figure out whats going on.

I'll look through the yellow pages and try and find a local auto electrical specialist.