Expands Windows XP SP3 Beta Preview

Microsoft has expanded the beta for Windows XP SP3. It's still private, but they have added Vista SP1 and Windows Server 2008 testers. The email, sent to the additional users, said:
“As is standard practice for operating systems nearing the end of their sales period, Microsoft will be releasing a final Service Pack for Windows XP in the first half of 2008. Microsoft is pleased to announce the availability of Windows XP Service Pack 3 Beta Preview, to Windows Vista Service Pack 1 and Windows Server 2008 beta testers.
“Please obtain the update package for Windows XP SP3 Beta Preview in English, German or Japanese, as well as Release Notes. You can use your current bug logging tools to file bugs; we request that you preface bugs with [XPSP3] in the title.
“We are interested in all feedback on Windows XP SP3. We are especially interested in scenarios involving communication between Windows XP Service Pack 3 machines and Windows Vista Service Pack 1 or Windows Server 2008 machines.Remember however, that SP3 will include no new features; it's basically just a roll-up of past fixes. Still, since Microsoft has forced the "Autopatcher Project" to end its work, it would be great to have a new baseline to use for installs --- as we know there are a huge number of XP users out there.