As you all know by now, you can add a second hard drive to the new Mini. Here is the link on how to do it. Let's use this thread to post all the FAQ or problems encountered doing this mod.
http://www.ifixit.com/Guide/Repair/Mac-mini-A1283-Terabyte-Drive/660/1#top
http://www.ifixit.com/Guide/Repair/Mac-mini-A1283-Terabyte-Drive/660/1#top