The maven support is shaping up... good work! I'm super excited about it. Here's a knit-pick:
When importing from a maven pom, the second wizard screen prompts for the compile output path (see image). I don't understand why the importer isn't using the information from the pom instead of asking the user. The standard maven directory structure dictates that compiled classes go in target/classes (and target/test-classes for test code). Users can override this in the pom using <build><outputDirectory></outputDirectory>...</build>.
In any case, there's no reason, IMHO, to be asking users for this information. They can change it later if they want to deviate from the norm and have IDEA compile elsewhere from Maven.
At the very least, it should default to the standard maven output directory (or that which is specified by <outputDirectory>).