I haven't seen this mentioned anywhere. While not really a hit, it is a cool new addition to Leopard.
If you move a hard drive icon to a specific location on the desktop -- even on a second screen -- the Finder will leave it there, even after a reboot! This is something that has bugged me forever, and now it's been fixed.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20071107093256829