The new miniStacks join 80, 160 and 400GB models and retail for US$289.99 for the 320GB model and $499.99 for the 500GB unit.
Both new miniStacks feature 7200RPM hard disk mechanisms with an 8 megabyte data buffer. The miniStack is designed to fit on top of or underneath the Mac mini.
Each miniStack features a smart power switch so the drive turns on with the mini, a thermal probe that automatically regulates and varies fan speed according to the temperature, and an integrated 2-Port FireWire and 3-Port USB 2.0/1.1 hub for additional devices.
The dimensions of the miniStack are 6.5 inches x 6.5 inches x 1.5 inches.