one thing i am missing (or have overlooked as of yet? if so, please enlighten me) is the ability to save performances in "setlists".
that would be especially usefull if you play in more than one band (as i do), and would like to organize
your performances like songs. you could then save the order of these performances (or songs) as a "setlist",
to be very conveniently recalled every time you have the same gig again.
or, you could simply save all songs you might ever play with any given band in a pool, and according to what's on the menu,
rearrange your songs (read: performances) on the fly, in any order you need.
seems handy?