From the changelog:

* #10: Deprecate "area" in configuration for "region"
* #11: Fix name length, via @pdunnavant
* #12: Generate instance names that are valid for GCE


The biggest change here is to move away from the concept of “areas” (something I invented myself) to Google’s “regions”. So, instead of putting this in your .kitchen.yml:

area: europe


you should now start putting this:

region: europe-west1


However, backwards compatibility with the old “area” key will be maintained, at least until a 1.0 release.