The Iconfactory has released , a free upgrade to its its $13 system monitoring utility for Mac OS X. Version 2.0 adds pop-up info windows with more info; the ability to load/save the application's appearance as custom iPulse Jackets; new mobility gauges let you monitor battery power and wireless signal strength; new disk activity gauges show when your disk is being accessed; peak indicators for disk and network activity; system hotkeys to show or hide the iPulse window; mouse transparency; reduced CPU usage, and Panther compatibility.