In January I wrote about Equestria Jukebox, the unusual pony creation utility/chat app successor to the Pony Avatar Creator, and its alpha client came out on this Monday. It looks pretty neat so far, although there's a distinct lack of manes and accessories for users to pick from and I was unable to save my abominations to the server, leading me to believe that they have gained sentience and are actively discriminating against ugly original characters. Do note that the userbase is fairly small at the moment, so if you do make a chat group it'll probably take quite a while to grow (unless the service undergoes a sudden growth in popularity).
There's always Lunasync as an alternative, of course, although nobody seems to use it ;~;
EqJ needs a Deadhead room.