I am currently running the newest firefox build, it is 64-bit and completly redesigned, it feels to me like its uber fast compared to the firefox 3.6.3, right now its codenamed minefield, it also uses windows 7 aero effect, also this is pretty much the first step into getting ready for firefox 4.0
I'm going to wait too because I found out (after downloading) that at present time, you can't use the alpha with flash player. So you won't be able to use youtube for example from the mozilla alpha application.
I run 64 Bit, on Windows. I am amazed by all the crap that isn't compatible with 64 bit computers. I have to try this out... if only FF wasn't my primary browser.
Bleh. Don't use FireFox much, but I need to use it for browser testing - so I can't install this... However it's good that they finally took the leap to using the Aero interface. 😀