As many of you have pointed out, a whole bunch of images have been posted up of Equestria Girls (primarily from 4chan). Needless to say, there are spoilers everywhere. If you wanted to keep your first foray into the movie fresh, you may want to browse the ponynet carefully until it releases. EQD will be keeping anything related to the movie that could be considered spoilery marked until it officially hits theaters.
Those that don't care can find a gallery of the movie over on (Spoilers) imgur.