Super Screenshot!. Give it a URL and it'll grab a screenshot of the entire page, top of the page and display it in various sizes. Which I suppose you can then capture and use elsewhere. Except that it doesn't include some scripting, so there are big white gaps where there should be content. Not sure about it myself, but someone will love it. Thanks to lo-fi for this one.
Skitch is another of the screenshot capture programs. Capture part of a page, manipulate, store, blog it. Looks nice, but I'll stick with kwout for the time being