Check this out... : http://www.microsoft.com/windows/ie/ie7/default.mspx
I think internet explorer is gonna jump ahead of firefox... it's gonna have tabbed browsing and some other promising stuff. I'm a big firefox fan but this seems like it will be better.
Download the beta 2 preview from the site above (that's not the complete version... so you can expect it'll be better when its done).
Also, has anyone heard of windows vista?
http://www.microsoft.com/windows/ie/ie7/default.mspx
Sounds good... I'm not sure if I'm gonna get it though.