Please note that this is not a feature of LinuxMCE, so the snapshot version does not matter. But it should be possible to set up manually if the hardware supports it:
First, you need to check if the USBUIRT supports waking up a computer. I think so, but you should do some research online. You might also need to configure what button it wakes up on.
Secondly, you need to check if your MD has wake-on-usb enabled. This is usually done in the BIOS.