This is from a thread on MLP arena. There aren't any release dates planned for the new stuff that I can see.
And in other news, it sounds like Hasbro has plans to release Lunchware, Drinkware, and "Lighting" based on MLP in 2012. No clue on what exactly these are, but they are apparently in production from a company called Spearmark. The main article for this can be found here. Thanks to Zephyr for the heads up on that!