Safari Beta for Windows Download
It's about damn time. Now I can accurately test my web applications without having to worry about them potentially not working on a Mac.
...though it's never really been that much of a problem (if you follow standards it never is), I've often worried that some unique quirk of Safari's KHTML rendering engine would render one of my applications inoperable.
The main thing I noticed was its extremely fast loading of a Digg article commenting page -- these pages load horrendously slow on IE or Firefox, and Safari seemed to render it, no sweat!
Looks like good things to come!