iTunes menu commands
One of the neatest features of NetTunes is the way it transmits keyboard shortcuts for iTunes menu commands. This is particularly useful to me, since I am running a NetTunes server without a monitor or keyboard (see another thread for some more details on how to do this). I can type command-Y to change iTunes preferences on the server, or I can upload mp3's to the server over the network, then type command-O to add them to my iTunes library.
However, this is also the one aspect of netTunes that is the least intuitive. I keep finding myself running iTunes locally just so that I can look up the keyboard commands on the menus. Perhaps in a future update, you could add a menu? Maybe a single hierarchical "iTunes" menu listing the commands that work?