Yet another home automation/security system available from a major retailer (Best Buy):
A starter kit, including hub, motion sensor and door/window sensor sells for $229. Viper uses some sort of 2.4 GHz radio, but provides Z-Wave compatibility using USB dongle available for extra $25. Also available: key fob ($25) and security camera/motion sensor combo ($150).
More info here: http://www.viper.com/Home/