Apple's iTunes U is taking off, and yet there is no way to bookmark it. Here is a workaround: Save this AppleScript into ~/Library » iTunes » Scripts:
open location "itms://deimos3.apple.com/indigo/main/main.xml"
Now go to Keyboard & Mouse preferences and assign a shortcut to your script. As an alternative, you can run this one line in Terminal (the backslashes should let it copy and paste successfully):
echo 'open location "itms://deimos3.apple.com/indigo/main/main.xml"' \
>> ~/Library/iTunes/Scripts/iTunes\ U.scpt;\
open /System/Library/PreferencePanes/Keyboard.prefPane
Next time you launch your iTunes, use the hot-key to go directly to iTunes U. You can also change the target URL into whatever you want:
Mac OS X Hints
http://hints.macworld.com/article.php?story=2007101812001069