More observant among you might notice that there is already new version of VHD Attach. Those who use it on Windows 7 and Windows Server 2008 R2 have no reason to worry: only difference between versions 3.00 and 3.01 is that VHD Attach now supports Windows Thin PC.
If you happen to use Windows Thin PC than just remember to install .NET Framework 4.0 before VHD Attach and you should be just fine.