Here's my tip. If you want to get ready for the Google's Android
technology and experiment with the platform before first phones hit the market, check out the Android plugin
available in the IntelliJ IDEA plugin repository. Although it still has some rough edges when used against the most recent Android release, it smoothly integrates into IntelliJ IDEA and follows the same productivity concepts like navigation, preview or code-completion. The brief plugin's getting started guide
will make your first simple Adroid application up and running within a couple of minutes. Enjoy.