2.0 GHz Core 2 Duo Intel processor, 2GB memory, 60GB hard drive, running Mac OS X 10.6.8 Snow Leopard.
Works great except for WiFI. May be an antenna problem but range is poor. My WiFi router is in the basement. If mini is down there, 15-20' away it connects. If it is on the main floor, 20+ feet away it doesn't connect.
Of course, the Ethernet port is fine. If you don't need wireless, this is a great deal on a mini.
This is just for the computer. You will need a keyboard/mouse/monitor. It uses standard USB peripherals, and DVI video so almost anything will work.