AppLocker and Powershell 2

Today, Microsoft suddenly remembered that I'm a Windows 7 Beta tester and sent me the new Technet Springboard Newsletter. It includes some discussions of features targeted at IT Professionals, and I thought that AppLocker and Powershell 2.0 looked especially interesting. Has anyone had any experience using them yet?

As far as I can tell from their description, the Code Signing feature of AppLocker will enable 'safe' downloads from both first and second party sites of approved updates. No worries that someone has hacked the material.