Microsoft has just released the Windows Embedded Standard CTP and it is available for public download as a 4.2GB ISO from Microsoft Connect:
We're excited to announce that the Windows Embedded Standard Community Technology Preview (CTP) has been made available for download! Please download this build and help us improve the quality and reliability of Windows Embedded Standard with your valuable feedback. You can submit bugs and suggestions directly on the Connect site, and if you have any questions please post a thread on the Windows Embedded Standard MSDN forum. The product team will be monitoring the forum and responding as quickly as possible.
Don't forget to join us on June 3rd for the Windows Embedded Standard Launch Event to hear all about this new release and get ready to build the next generation of smart, connected devices. And if you want a chance to win an Xbox 360 Elite console, simply register for the Launch Event AND download the CTP then you will be automatically entered in to win one of ten Xbox 360 Elites!
More info: Microsoft