Open for submissions now and I think this would be the best time to query them for two good reasons:
1. They were the ones who handled the Potter series.
2. Now that Rowling has departed from them and her long time agent, I'm guessing they are looking for the next big thing to rep. I'm also guessing they probably have a lot of pull in the literary world aka publishers. What other agency can say "We represented the biggest author of the latter half of the 90s and all of the 2000s"