I posted this exact same thread, nearly with the same title, not too long ago because I kept hitting that stupid key when playing Day of Defeat (which then switches to Win desktop and kills the sound, forcing a shutdown of Half-Life to reinitiate the sound :| ).
Anyway, I have a Microsoft Natural Keyboard Elite, and the easiest thing was to just pop the key right off. It didn't break, and it will easily go right back on should I decide to replace it. I was willing to break mine though.
