Just got free time to play with Power Shell recently. Power Shell is really a cool tech. It enable you to create your custom command or it is called cmdlet in PowerShell and it is created with your familiar technology .NET if you are a .NET developer. For more information you can refer to some blogs and websites stated below:
Links
Books
Hope i will still get some free time after that to post some of my research done lately on PowerShell and DirectShow.