Confused yet? Good. sg_06 has put together a contest system for those who aren’t artists and those who want more practice. To clarify, this is just for fun and the only profit is more pony.
This is really interesting, it uses image board style for submissions for the various themes the contest master has thought up. The main page has more details and you can poke around and see what’s up. It’s pretty simple once you see it for yourself, but really hard to explain somehow.