If you look a little futher, you'll see that it even does more than syncing. You can also sync address books, calendars, and bookmarks. There are also a number of apps you can install to add more features including tasks, notes, etc. Soon, there will also be a great ownCloud alternative to Google Reader.
As you would guess, Owncloud works great on a Mac mini. Here is a tutorial for installing Owncloud on a Mac mini. I was going to post screenshots and a walk through, but you can try a demo of Owncloud right online. And if you like it, you can download from their site.
If you have any questions, you can reach us @macminicolo on Twitter.