I haven't really kept up with doings on the Pottermore site, but I read that J.K. Rowling had writtena new snippet about Dumbledore's Army at the Quidditch World Cup (
www.barnesandnoble.com/blog/j-k-rowling-writes-new-harry-potter-story-fans-rejoice ) and hopped over to take a look.
Except for the for the minor mistake regarding the name of Hermione's partner (and we all know Rita has trouble keeping her facts straight) it is a funny, catty slice of Potterdom, with hints of more to come.