TUAW:
I think we will see an updated Mac Mini in form factor and capability, an update to the iLife suite, more features and refinements to MobileMe and updates to iWork. In fact, the entire iWork suite may end up on the web much like Google Docs. I also think there’s a good possibility we’ll see updated iMacs and a preview of the next version of OS X (aka Snow Leopard) running on them.
Nothing terribly ground-breaking.