Help! My daily driver is turning into my Valiant!

So, I don't know if this is exactly Kosher, but, well, I have a Pontiac(:wack:) that seems to want to make all sorts of electrical gremlins apparent. I'm posting here because the people on here don't seem to be as big of douches as the guys on most Chevy forums. I'm ready to ask anyone and everyone because this is annoying and I can't seem to pinpoint it. The battery light is on, and stays on, yet the battery reads good and the alternator is working fine. I'm thinking it might be the voltage regulator but I'm not entirely sure. If it helps, most of this stuff is original equipment(car has 65,000 miles, 1 owner) and should probably be replaced at some point, but I'm not going to throw money at it until I know what to replace. Can anyone help?