@Chip Bennett - Yep. I know Pligg came with a bookmarklet I think but that idea will definitely help WPVote gain traction. In fact, I wonder if Ben can hack the built in PressThis bookmarklet in WordPress to be the WPVote submission tool bookmarklet.

Also, the plugin would need to show something like a Digg counter within the article that people could click on to vote or submit. A lot of this stuff accounts for the success Digg has had.