ROMUpdater is meant to be an Android universal ROM updater.
It checks for the build.prop's ro.build.display.id and
downloads a series of JSON files that describe and give
a link to the available versions (from the next one
upwards, if available). It can also execute the most
common Recovery actions (via /cache/recovery/command
and extendedcommand), for example Nandroid backup,
cache/data wipe, or simply enter the removery mode.

This application requires root.

ROMUpdater is a free software and its source code
is being distributed under the GNU GPL v.3.

You can find the final APK in the market as
"ROMUpdater" by Giacomo Furlan

For more informations please visit the following sites:
Website: http://www.elegosproject.org/android-rom-updater/
Google-Gson project: http://code.google.com/p/google-gson/