OK, it's not that exciting to us FireFox users, but for people waiting for the offical release, Internet Explorer 7 is here:
http://www.microsoft.com/windows/ie/downloads/default.mspx
IE7 is a recommended security update for all Windows XP and Server 2003 systems, even if you use a non-Microsoft browser by default. IE is part of the Windows OS itself, and network-aware software on your computer can use IE as well.