AppleScript – underestimated and under-advertised since 1995 or so. It can now deal with images. I hope that Apple eventually actually tell people about this neat technology and give easy tutorials.
via 2lmc: Tweaks for Exposé and how it's run by the Dock. Don't know what that blob thing is supposed to be good for, though. Should Exposé really be invoked in application mode when there's only one window around?
Don't you have the impression that Exposé works particularly well with large windows – particularly those in Apple's examples, even the ridiculous ones. – Go follow that link, watch the film, read the MacNN 'discussion'. Laugh. – It seems to find tiny windows, e.g. minimised Stickies irritating and wastes a lot of space when they're around.