Not at the moment.

However, in OGA 2.0, we're going to have a system for determining the "done-ness" of art, where we can set it at WIP, Finished, and Refined.  The reason for this being that, since Open Source is a collaborative effort, it's more constructive to point out where a piece of art has room for improvement.  The difference between this scale and a normal rating scale is that it's designed to allow a piece of art to move upward along it as it's refined and improved.  But, from the perspective of someone who's searching for art, it should accomplish the same thing as a rating system.

Bart