Intego announced NetBarrier X4, the latest update to its personal firewall application, on October 27. NetBarrier has been optimized for improved performance and Mac OX X 10.4 compatibility. It also includes anti-spyware tools, network monitoring, and Dashboard widgets for checking network and security information. NetBarrier X4 is priced at US$44.95, and will start shipping at Macworld Expo 2006 in San Francisco.