Well I was serching for 64 bit apps and I stumbled on it!
http://www.mozilla-x86-64.com/firefo...4-20040105.zip
Now it is ported, and I have yet to try it.. But I figured I'd post the linky for all of you that would like to give it a go... Oh, and I'm on XP Pro 64 RC2... Its avalible on M$ web site