The recently announced GoPro Android App is now available for download. The new app features full control of all camera settings and remote viewfinder/preview on your Android device for shot framing.
It is currently compatible with Wi-Fi BacPac-enabled HERO2 cameras that have received the latest update from GoPro. Compatibility with the HERO3: White and Silver Edition should be coming this month, and compatibility for the HERO3: Black Edition should be available in December 2012.
You can download the new app here at the Google Play Store.