I was tipped by Shane Isbell about Masa which is a project developing and providing Maven plug-ins for Android development. The currently released version 1.1 supports Android SDK 1.5. The project also provides a Maven repository at address http://repository.slideme.org/nexus/content/groups/public/. I will try to use the Maven plug-ins and report about my experiences.
Thank you Shane! You can read more about Masa and other Android related storied from Shane's blog.