I have a Rev D 12" PB Superdrive maxed out with RAM and HD space. It's my first Mac, and I love it to death. The portability is fantastic, and just what the doctor ordered for a busy student/intern. Not that the 12" screen is too small for me, especially with expose', but there are times when I'd like to have more real estate to work with (wouldn't we all). I've been looking at the 20" Cinema Display to set up on my desk at home, and I've had an itchy trigger finger since my tax return came in. Before I bite the bullet on this, I'd like to know if there are any issues with running ACD with the PB in clamshell mode. I searched for the topic and found a few posts that had the PB overheating and screwing up its own screen. Does this actually happen? Is this an isolated thing, or the norm? Would a Screensavrs from Radtech protect the screen from the heat-warping? I'd hate to spend $1000 just to screw up my computer. Thanks.