I have the latest mini... and have to say it is not a bad little machine.
They are a bit high on price, considering they went up to $700 and only have 2GB RAM. I upped mine to 8GB, the maximum it can hold, for $110.
I will say that even at their price, they seem well built.
Granted I could have gotten a PC with similar specs for nearly half the price. But after using it for a while, and setting up a few "low end PCs" for friends I am convinced it is not such a bad deal after-all.
For one thing, you don't start out with a crap-ware infested system from the get-go. To me that is a big drawback on many popular brand PCs. Nothing like spending the first hour or so--or few hours--getting rid of the crap preinstalled.
Also, the budget PCs I have seen usually don't have gigabit ethernet AND dual band WiFi (a/b/g/n).... not to mention bluetooth that actually works and HDMI out of the box. And Firewire 800 if you need that (but USB only 2.0 not 3.0).
So overpriced a bit, yes, but a solid buy too. I think they would be a good deal if they had 4GB of RAM and/or were $100 less in price.
Michael