Everyone needs to watch this one: Swift
If you like Safari's renderer on OS X, whether you use Safari, Shiira, OmniWeb, or something else, this is something to watch. This is the open source WebKit, the foundation for Safari, ported to Windows and given a simple interface. My assumption is this is going to build out quite a bit, and should be cool to watch.
Now to see if someone will send it over to GTK2. :)
bah, webkit.
opera 4 life!
just kidding, that's pretty neat actually.