Windows Web Services API team has just release the Beta version of the API for Windows XP, Windows Vista, Windows Server 2003 and Windows Server 2008. It is available now on the Connect site for Windows Networking. This release contains the same version of the runtime as in Windows 7 Beta. You may find the table that summarizes level of Service Packs and CPU architectures supported by this release and direct links to download pages in this announcement. Please try it out and report any installation and runtime issues by submitting the feedback using the WNDP Connect site. The reference documentation for the API is available from MSDN. Please use this forum to ask WWSAPI team questions about the API and just released installers.