Olivier Bloch from the Microsoft Windows Embedded team created several very informative videos about various scenarios for Windows Embedded Standard 7 devices. He covers topics like why use Windows Embedded Standard 7, how to create a customized Media Center experience and shows how to benefit from features like DLNA.
The videos can be found in his blog on MSDN:
Windows 7 features for Embedded
Custom Media Center Experience with Windows Embedded Standard 7