MyLittlePony.com has once again updated their look. They also added some new content. There are several puzzle games, including a Bridle Gossip Puzzle Game which was also released on Hubworld. There's also a G3.5 "Curtains Up Matching" game, which I haven't seen before. It must have been used for a contest at some point, since if you make all the matches it says you get a bonus entry to a contest, though the contest doesn't seem to exist.
The previous iteration of the site would periodically update with episode guides, which included coloring and activity pages corresponding to Season 1 episodes. That fizzled out after "Bridle Gossip" was posted, but it appears that the coloring and activity pages for the rest of the season are now available under Printables. Nothing for Season 2 yet though.