I'm trying something new. Since I receive a ton of information that doesn't warrant detailed exploration in TidBITS, I'm starting a new section called TwoBITS that will address deserving announcements but will do so in only two sentences (and contact info). Let me know how you like it after you've seen a few.
Cull Graphics Quickly with Preview
You're faced with a folder full of images, and you need to sort through them, trashing some number and keeping the rest. For a quick way to do that, select them all, and open them in Preview (in Leopard, at least). You'll get a single window with each graphic as an item in the drawer. Use the arrow keys to move from image to image, and when you see one you want to trash, press Command-Delete to move it from its source folder to the Finder's Trash. (Delete by itself just removes the picture from Preview's drawer.)