If you are a Maven fanboy (or just a plain user), there is a Google code project developing and providing a Maven plug-in for Android development. The plug-in lets you to build Android application projects (apk) with Maven and with minimal configuration. The plug-in project has also produced a decent Getting Started Guide. In addition, since the project deploys to Maven Central, you do not need to bother to configure any repositories of your own.
I have used Maven in some past Java projects at work. Since my own experiences in using Maven have been mostly positive, I plan to take this Maven plug-in into test use.