I recently bought a 120GB Corsair Force GT. Its my main boot drive with all my applications etc.
A few times when I've left it on over night, I've woken up to a black screen with text (POST style) that says something along the lines of "No boot device found, please insert boot media and restart". If I restart, everything works fine.
I didn't update the firmware when I got it, since the site said only to update if you were having troubles. Would this solve my issues?