John Gruber has some great stuff about Spotlight, in Daring Fireball: Spotlight on Spotlight.
Incidentally, Tiger is good. Reallygood. Of course, it’s not ready for primetime yet and there are lots of unresolved bugs, some quite nasty. But moving back to Panther after using Tiger for a while was painful. I wanted Spotlight. I really, really wanted it. Roll on the full release.