So Safari on Windows is the version 3 public beta, so there are bits and pieces of it that don't quite add up to scratch yet, but it's pretty badass. Yup, tabbed browsing, although i'm not sure about the keyboard shortcuts yet.
One thing I did do was hit a bunch of pages and time the rendering between Safari 3, Firefox 2.0, and IE7, and on three separate PCs Safari beat them all. Pretty cool, for a development house that has two other applications for windows.