How to move iTunes database from Windows 7 to Lion where the music is on a network drive?
Here's what finally worked.  


Copy the file "iTunes Music Library.xml" from Windows to somewhere on your Mac, like your desktop.
Change all references to network location of the audio files to something the Mac can understand.  For example, all of my MP3 files started with file://localhost//192.168.1.6/music/  So I did a Find &amp; Replace and changed them to the path the Mac mounted my remote music folder: file://localhost/Volumes/Media/music/
Clear out the iTunes directory in ~/Music.
In iTunes > Preferences > Advanced, uncheck "Copy files to iTunes Meida folder when adding to library".
Then import the XML file from step 1 into iTunes by File > Library > Import Playlist.


The "Re-creating the iTunes Library file" section near the bottom of this article helped.