Josh has tried Numbers, the new spreadsheet app from Apple, and finds it pretty but unusable for anything vaguely serious. This mirrors my experience with Pages, their word processing/DTP app. It’s lovely, the controls are almost always exactly where you expect and work how you expect, and it’s just a joy to use. Until you get past about four pages, when it bogs down so horribly that a third of my time is spent watching a beach ball spin. For reference I’m working on a 16 page document with a couple of embedded graphics, using a MacBook Core Duo 1.83GHz and 2G of RAM, and haven’t experienced such lag since using my 286 in 1990.