MS Formally Announces Windows Vista SP1 Beta

After a lot of speculation, leaked builds and closed beta testing - without specific public details about SP1 - Microsoft today posted an announcement on their official Windows Vista blog detailing SP1 and their plans for it.
Now is the time and the time is now:  let's talk about Windows Vista Service Pack 1 (SP1).  Much has been made of what will or will not be included in SP1 and when it will be released (some accurate, some otherwise).  I'm here to set the story straight:  we're in the process of developing and deploying a Beta version of SP1.  This post will describe for you what to expect from that effort and how you can be involved in the process.
They say they are targeting SP1 for Q1 2008. Based on the history of the delivery of Vista itself, that could mean anytime in 2008 - or 2009.