To the people who are saying 'I didn't think it'd get this big': You had a former president answering MLP questions on NPR with a straight face,
http://www.npr.org/2011/06/25/137386121/bill-clinton-plays-not-my-job
a fan-based fighting game that is currently in the works
magazines running stories on bronies
and, honestly,I can't go on with this list without consuming copious amounts of alcohol, and I have to work tomorrow.
So, yeah, don't be so freakin' shocked.
As for the people going 'I hope this is a bad translation' or 'I hope this is fake' or 'OMG ponies suxxors', just take comfort in the fact that you'll be able to take a broadsword to the sides of their smiling, friendship-loving faces.
To me, it's the best use of a pony since Mr. Toots got turned into a weapon for Red Faction: Armageddon.