Had beta 2 on a test machine at work all week, just playing about with it, as you say I'd not put it in a live environment.....

It took just shy of 7GB to install, a fair size then! Also downloaded the Office 2007 Beta 2, which just like Vista and XP, looks like a glorified version of Office 2003....I've got plenty of testing to do, but I think it's safe to say we wont be upgrading to it next year...