When running a dual monitor setup on a laptop, I've always unplugged the monitor cable and plugged in the SVHS cable when watching DVDs and the like. What I found out today is that, when having both monitor cable and SVHS plugged in, the second monitor part of the displays menu shows both PAL/NTSC resolutions as well as my monitor resolutions. Selecting a TV resolution made the monitor go idle and TV active, as well as vice versa. No more cable swapping!
Mac OS X Hints
http://hints.macworld.com/article.php?story=20030727072136245