Mozilla just released Beta1 of Firefox 3.1 browser. They haven’t yet made the official announcement though.
The noticeable features include Ctrl+Tab 3D browser, faster JavaScript performance, and Open a new tab button just like Internet Explorer 7. If you want to give a try, here is how to install it:

If you regularly run a couple of OS from your VirtualBox and want to login to those OS directly from GDM session, here is a quick way to do it. For this to work you should have already set up your VirtualBox. Here we won’t be talking about how to setup VirtualBox but only how to login to a virtual OS from GDM session.