Apple's Mac mini doesn't look any different than the previous PowerPC version. It features the same design and dimensions.
However, as with all-new Macs, the Mac mini is powered by an Intel Core 2 Duo processor. You can select from a 2.26GHz processor to a 2.53GHz model. The entry-level 2.26GHz model comes with 2GB memory and a 160GB hard drive. The 2.53GHz model comes with 4GB memory and 320GB hard drive. Whichever mini you order can be customized-to-order (CTO) to your specifications: from a bigger hard drive (500GB), to as much memory as 4GB. All come standard with an airport card, superdrive and Snow Leopard installed. There's even a 4GB memory, 500GB hard drive version with Mac OS X Server Snow Leopard. All you need is to supply your own monitor, keyboard and mouse.
Some may wonder how Apple can pack so much into a small package. Simply put, they use a similar technology used on their Macbooks - smaller logic boards and 2.5" hard drives. Rather than laying flat like a Macbook's, these components are stacked on top of each other, offering a smaller footprint, minus the LCD display and keyboard, of course.
For a closer look at the Mac mini, please visit http://www.apple.com/macmini/