As I was typing up this entry the first time this evening on the family PC (I've been given my own login to set things up how I like:), the power cut out... and stayed out for an hour. We had a pie for dinner, cooked on the BBQ, and the bottom was charcoal too. I haven't had much luck today.
Figure 1: The culprit circled in green.
Figure 2: The big white splotch is where the IC package has melted away. The dark stain above is where the board itself has been charcoaled. (I really wish I had a better camera.) The three pins have melted away too. :P
At a wild guess, I'd say this was the voltage regulator, but my electrical knowledge is shoddy at best.