Good new year celebration should start with new version of VHD Attach.
Major change for this version is support for new VHDX virtual disk format. This will work only on Windows 8 so don't get your hopes up immediately if you are on Windows 7 system. Support for it on Windows 7 depends on Microsoft updating its virtual disk SCSI driver.
As usual you can upgrade from within application or from the website.
PS: Yes, I know that install experience on fresh Windows 8 system is not really nice because service will not start automatically. You will get opportunity to start it first time you run application. Don't be bitchy about it.
PPS: If you want to know what is happening behind the curtains you can check source at BitBucket.