As I mentioned in our last post, we're going to be adding a Mac Mini Server to our iOS home . Our Mac Mini is going to have to do some heavy lifting - distributing music and HD video to AppleTVs throughout the house. We may need to buy the latest and greatest. But I'm also a huge proponent of buying used, last-generation Apple equipment. So let's take a look at how the Mac Mini has changed over the years, in terms of form and function.