After many weeks of misinformation, Microsoft has finally offered public, official information on the upcoming beta release of Vista's first Service Pack, aka SP1.

Here's the important data:

• The beta will be available to the public in the next few weeks. It is indeed in the hands of a select few pre-beta testers already.
• The actual release of SP1 will come in the first quarter of 2008, give or take. Microsoft is already admitting this date could move either way (though most likely, later into 2008, should substantial problems arise with the beta).
• The beta is primarily focused on improved reliability and performance, better hardware support, application compatibility, and adding support for "emerging standards." An extensive white paper outlines these additions in more detail, but you'll have to sift though a whole lot of marketing doublespeak to get to the good parts.
• The standalone service pack will be a 1GB file and will require 7GB of free space on your hard drive to install. "Express" installation will require only a 50MB download (but also 7GB of free space for installation). You get back most of that space after the installation is done.
  

Microsoft would also like you to know that Vista is so awesome that you don't need to get excited about a service pack and that it is always looking out for your best interests by rolling out pre-service-pack updates like these. So there.

LINK: Announcing Windows Vista Service Pack 1 Beta