Question: Have upgraded to eclipse.indigo using a new installation. Added m2e. Maven shows up under Windows>Preferences. File>New>Other>Maven gets the following options: Checkout ..., Maven Module, Maven Project. The Maven POM file option is missing. I'm trying to add Maven support to an existing Java project. Have read the manuals, searches, helps, etc. No explanation as to why the Add POM option is missing. Any idea how to get this option to appear?

Answer: 
In order to create a POM on your project, and also change the project structure to Maven default, **right-click on your project > Configure > Convert to Maven Project**.

Don't forget to choose the correct *Packaging* type (in your case I guess it will be POM).
Quick workaround: Adding a POM by hand. (Also I'm not sure that I've ever seen an "Add POM" option.)

Simply add a file to your project (New > General > File), and name it *pom.xml*. On double-click on this file, the POM Editor will open.