AutomateIT. Free from the Market.
I've setup Rules for the following ...
- Enable BT, Rnable GPS, set Screen Brightness to Auto, Set Music Volume to 100%, Disable Wifi (if enabled), Enable Mobile Data (if disable) when placed in Car Dock.
- Disable BT and GPS, set Screen Brightness to 30%, Set Music Volume to 50%, Enable Mobile Data, when removed from Car Dock
- Enable and Connect to WiFi (and disable Mobile Data) when I arrive at Work or Home. (Uses Location-based Services) *
- Disable Wifi and Enable Mobile Data when I leave Work or Home. (Uses Location-based Services)
Pretty powerful stuff. A lot of option and actions that can automate things and save battery. Even has actions based on Battery %. Lots of COOL stuff!!
* Believe it or not -- the Bionic currently does NOT disable Mobile Data when connected to WiFi. The 3G/4G icon may disappear, but the RADIOS are still on sucking power. That's supposed to be fixed in the next OTA update.