If it's not released for a while, do you think getting the 2012 Mini would be a massive mistake now, even if it was fully speced? I want to get it as soon as possible as my PC has self combusted and need one for my degree, so not really prepared to wait for months more.
If you get a 2012 version now, get a refurb. It doesn't make sense to pay the full price of a new one for something that's more than a year old. I got my 2011 server as a refurb just a couple months before the 2012 models came out. It's just like getting a new one except it comes in a plain brown box.