1) Edward Kitsis and Adam Horowitz will be at the WonderCon 2012 in Anaheim, CA on Sunday March 18th. There will be an exclusive screening of the episode, "Heart of Darkness," which coincidentally, will air on the same night. Also, afterwards there will be a Q&A with the two creators. For more information click on the link above.
2) Speaking of which, there are some new photos from the episode from TVOvermind.