Nice titles
Nate over at webgraphics talks about a new feature he'd like to see in Safari: that titles on links should be shown in the rather pretty way that Safari currently shows dragged links:
The Safari browser showing a partially-transparent link summary when dragging a link
That's rather nice, that. Of course, it doesn't need browser support. Try mousing over, or tabbing to, some of the links on this page: you'll see the same effect. It's all done with CSS and a little bit of JavaScript.
Nice tooltip/popup lib in JS/CSS.