Yes, the very much anticipated Visual Studio 2005 Service Pack 1 Beta is now available through Microsoft Connect. If you signed up for this Beta a week or so ago, you should now have the access to download it! Separate downloads are available for Standard/Pro/Team* and Express editions. The service pack file for non-Express editions takes about 370 MB, and the list of included HotFixes looks long enough... :) I'm just installing it on my usual Beta/CTP suspect - my NX7010 laptop, currently running Vista RC1. Let's see what happens ;)
According to Somasegar's post, the final version will be shipped in the next 3-4 months. The post also discusses the Windows Vista and .NET Framework 3.0 support, so make sure you read it in full...
[Update: looking good...]