Just how many songs are in your iTunes lib? ;-)
Snow Leopard is nice stuff. I think the performance gains have been slightly exaggerated, but on the whole it feels like Leopard with extra RAM.
The Expose changes are welcome. Not just Dock Expose, but the way in which Expose functions has been changed around. For example, if you have a minimized window, it now appears in Expose. Very handy.
Snow Leopard is a nice basis for OS X to advance into the next decade. 10.7 should be extraordinary. In the meantime, Apple, can we get a 64-bit iTunes 9 please?
Just how many songs are in your iTunes lib? ;-)