Dave Northey and a couple of the technical team in the Irish office downloaded what we believed to be Windows Vista RC1 from an internal site at lunch time on Friday.  It was build 5600 and we were 98% sure that it was RC1.  However, seeing as it hadn't been made official yet I was reluctant to blog about it.  Though now I'm delighted to say that I've just seen it on the wire that it was RC1.

So now if you are on the Windows Vista beta program or on the TAP participant, RC1 is now available to you!

Jim Alchin Microsoft's Platforms and Services Co-President posted an announcement last night (GMT) just after I had left the office, that RC1 is complete.  You can read the announcement on the official Vista team blog.