I've made some updates to OGA over the past couple of days that might interest people:

• I automated the art challenge to the point where it should be easy for us to keep it going.  Also, art challenge votes are now separate from favorites, and it should be possible to run multiple art challenges at the same time (in case we want to make them specific to a certain kind of art, for instance).  The latest challenge is on the left sidebar.
• In your user profile, you can now shut off the emails you receive when someone favorites your art.
• I changed the top submitters box to "Favorite Submitters", which adds up favorites instead of counting the raw number of submissions.
• Added a "Copyright and Trademarks" section to the Submission Guidelines page, given all the recent discussion about it.
• Fixed a couple of bugs.
• Probably made some new bugs.