Here is a nice video about using Powershell to execute a storage VMotion.
Ok it is a totally unsuported way because it uses a unsupported extention using a CTP version of Powershell. I downloaded the necessary software (Powershell CTP 2.0 and the Extensions) and got this to work myself. But I must admit it is pretty impressive and it shows the path where we’re going. And this is just the beginning.
I got this from the VMware powershell blog, it has a lot more powershell info.