Snap It
Would an image preview of a link help you to decide to click on the link or not? snap.com seems to think so. It is a nifty idea. Hover over the links on this page and see for yourself?
I thought I could find an open source tool that would convert html to an image and build a quick free version of this tool myself. But every library I could find was cheap, but not free. Anyone know of an open source one?