Apple's Mac mini hadn't seen a substantial update for about a year, but with Intel's Sandy Bridge-based second generation Core processor family arriving in 2011, it was only a matter of time before one of those chips found favor with Apple's tiniest desktop.
The Mac mini design really hasn't changed all that much in the year or so it took the folks in Cupertino to swap out the Core 2 Duo for a Core i5. In terms of volume and dimension, it's almost exactly the same as the 2010 edition, but with a major addition—support for Thunderbolt...
Apple's Sandy Bridge-Based Mac Mini Review

Marco Chiappetta
Marco's interest in computing and technology dates all the way back to his early childhood. Even before being exposed to the Commodore P.E.T. and later the Commodore 64 in the early ‘80s, he was interested in electricity and electronics, and he still has the modded AFX cars and shop-worn soldering irons to prove it. Once he got his hands on his own Commodore 64, however, computing became Marco's passion. Throughout his academic and professional lives, Marco has worked with virtually every major platform from the TRS-80 and Amiga, to today's high end, multi-core servers. Over the years, he has worked in many fields related to technology and computing, including system design, assembly and sales, professional quality assurance testing, and technical writing. In addition to being the Managing Editor here at HotHardware for close to 15 years, Marco is also a freelance writer whose work has been published in a number of PC and technology related print publications and he is a regular fixture on HotHardware’s own Two and a Half Geeks webcast. - Contact: marco(at)hothardware(dot)com