@Stephen Usher: "It's far slower than Snow Leopard on the same hardware and the re-implementation of the Finder is clunky"
All speed comparison tests published to date setting Snow Leopard and Lion head-to-head show no appreciable speed difference between the two. In some tests, Snow Leopard was slightly faster, and in others Lion was slightly faster. None of the differences were statistically significant. If you are seeing poor performance with Lion, I can only conclude that you have a problem with your installation.
I'm not reading reports (or experiencing) a "clunky Finder" either. Please elaborate - do you dislike the design, or is this related to the same performance problem you're having?