So I was watching a music video in the iTunes Music Store a while back (Go with the flow by Queens of the Stone age) and each time I went to watch it I'd have to load it again. I like that video.
So I whipped up this little shell script. As long as the video is open in iTunes (I'd let it finish loading, too), it will be able to copy it to your desktop. You'll have to rename it yourself.
cp -v `lsof |grep -i QTP| grep iTunes|awk '{ print $9 }'` ~/Desktop/currentmusicvideo.mov
[robg adds: There have been other hints here on saving the QuickTime temporary queue, but this seems like an easy solution.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20040428183055735