With this application you can monitor your CI builds right from your Android device. Hudson Helper uses Hudson's remote API in order to provide detailed information about your builds. Network usage is minimal due to the use of caching and local data storage.
More details at Hudson Helper for Android and Lava Lamps, Android and Continuous Integration
You can get Hudson Helper by searching for 'Hudson Helper' in the Market application, or from SlideMe.org. If you're using a developer phone and having troubles accessing Hudson Helper, let me know.