Firefox 1.0 was released yesterday. I suggest upgrading, and if you don't have it already, get it! It's better than IE in every respect. Yes, every. All of them.
...besides integration into the operating system, which is a horrible horrible idea in the first place. But I bet there some sort of extension to take care of that!
Anyway, try it out. It's lightweight, it imports your current browser settings, it does everything IE does, it's much safer and secure than IE, and a whole freaking lot more. And now that it's "officially" been released, you have no excuse not to be using it!