My PSU died the other day too. Mid BF2 heard a pop and no power to anything. It was a 480W unit as well, so its not like its short of power. One of the capacitors had blown in half. I think that its just one of those things that happen occaisionally. Mine was an Antec. What make was yours?
I still haven't got round to sending mine back yet, had a spare no brand 500W lying around so using that instead for the mo.