Start sending out your Download Party invitations. http://developer.mozilla.org/devnews/index.php/2008/06/11/coming-tuesday-june-17th-firefox-3/ "After more than 34 months of active development, and with the contributions of thousands, we’re proud to announce that we’re ready. It is our expectation to ship Firefox 3 this upcoming Tuesday, June 17th. Put on your party hats and get ready to download Firefox 3 — the best web browser, period."
I just read this article about Firefox 3 not being very mac-like: http://www.insanely-great.com/news.php?id=9223