Apple has posted a beta of Safari 3.0 for Windows. (There's one for Mac too, but Windows is the real shocker.) Safari supports XML, XSLT, CSS, XHTML, and RSS. Windows XP or later is required. New features include some CSS3 support, tabbed browsing, and an inspect element option in the context menu for web developers. This release is quite buggy, and will overwrite Safari 2 on a Mac. Don't install this on a production system.
This is also the browser that will be on the iPhone. The iPhone will be extensible through AJAX, just like a regular web browser. You still probably won't be able to install your own software directly onto the iPhone, but you can play it in the browser. The distinction isn't irrelevant, but it's less important than it used to be. Flash will most likely not be supported though.
