If you're going to use this in a HTPC solution, I think you're going to need the Dual-link connector. Yes I know this sucks, but I am in the same boat.
The new mini DisplayPort to single-link DVI adapter does not support the "Overscan" feature within System Preferences>Display properties.
This function of OSX is enabled via the USB cable found on the Dual-link adapter (I think but can't verify because of the 4-5 week delay from the Apple store). The older Mac Mini does not need any additional hardware to work.
I've been using my Mac Mini to test both scenarios in my HTPC and also with my ACD w/DVI, and have also been on the phone with Apple's tier 2 support twice so far. I am currently waiting on further correspondence back from them.