There are two more Bronies United tracks in progress. If you are interested in joining in on "Fluttershys" (The Owl City fluttershy song) Head over to this thread on ponychan. (Deadline September 27th)
Alternatively, Equestria Girls is also recruiting more people, hit up this thread! (Deadline September, 16th)
^UPdate^ And one more apparently! Giggle At the Ghostly here!
You can find Art of the Dress after the break!