Windows 7 SP1 Beta Now Available for Mass Consumption (Sort Of)
Keeping in mind that this is beta software (the Service Pack, not Windows 7), we'd advise against downloading this on mission critical rigs. But really, we're not expecting too much quirky behavior here. Rather than add a bunch of new features, Service Pack 1 for Windows 7 is essentially a bundle of all the previous patches since the OS launched, plus a few more.
Still interested? Good, but there's just one caveat. This isn't intended for home users -- not yet, anyway -- and you'll need an RTM (Release to Manufacturing) version of Windows 7 to run the Service Pack.
More info here.