This group isn't very active, and as such, art intake has significantly slowed down. I would like to point out a few sources of art that are still available to you:
Is a large art group designed for building a strong community of bronies, with dozens of daily submissions of art.
Is similar in nature to MLPFriendshipIsMagic, but is a larger group with more art sources and members.
Is a high-quality oriented group, focused on accepting only the best art pony art makers can produce.
Is a unique group that offers a good selection of art, not innately high quality but no junk either at a reasonable rate.
Please check out any of these groups, as they're still up and running!
~Fifth Element, Group Leader