If you use Firefox browser, you can download version 3 today after 10am PT and be a part of Firefox's attempt to set a Guinness Book of World Records attempt for the most downloads in a 24 hour period (click the picture above for all the details). I'm one of 1.5 million people who have signed up saying they would download today. Come join us!
Here is the download link. Right now, it is still for version 2, but I believe they will change it after 10am PT...if not, you will be able to find the link from here.