Intelliborn has updated their popular wireless hotspot app with a new feature called “MyWi OnDemand”. Instead of using a power-hungry WiFi connection, it uses a low-powered Bluetooth signal to share your device’s 3G connection on an (you guessed it) on-demand basis. This allows frequent users to leave the service running constantly, without having to worry about battery life or repeatedly starting and stopping the hotspot.
MyWi is $19.99, and available for jailbroken devices on Cydia. A free trial version available as well.