All this talk of drilling out the bolt and stuff, I got kinda pissed at the prospect of all that work for one bolt. So I went to Advance Auto and bought a 3 1/5 foot breaker bar, and these awesome sockets that remove stripped bolts. Having a little fire under you does wonders, it jerked right out. On a forum I read, it says that this came from the seal failing, and coolant getting in the grooves. Then mineral deposits formed that "cemented" it in. When I pulled it, I can see why, there was more mineral deposit than thread. I tried to get a pic, but they all turned out bad. Anyways, thanks all for the help!