Seen this post earlier over at neowin.net

One member's reaction was "Whooo!!! Thanks!! Another said "transfer rates are pretty decent, I am getting 743kb/second I am sure later on the servers are gonna get hammered once the emails start flowing into inboxes" (source). Yes folks, it's finally here. The moment you've all been waiting for.. Windows Vista RC1, the same build testers received on Friday.

Microsoft notes on the website: Windows Vista RC1 is available for participants of the Windows Vista Customer Preview Program. Please go to the Customer Preview Program website to register and receive a Product Key, which is required to install and activate the software.

For those of you who are brave enough to update: Before upgrading from Beta 2 to RC1, please install any Critical Updates from Windows Update for Beta 2. Go to Start, All Programs, Windows Update, and click the “Check for Updates” button.

Windows Vista RC1, English 32-Bit Edition | 2,584.25 MB (Expires June 1st 2007)
Windows Vista RC1, English 64-Bit Edition | 3,677.22 MB (Expires June 1st 2007)
Link: OMG OMG! Where do I get a key?
Link: Microsoft Download Page
Link: An exciting revelation unfolding here