Steefel finally told what the two new classes do in the Lotro expansion. Here's the news on that.
And they also told a ton of stuff about what the book releasing soon is like and Moria as it stands under development here. Enjoy :)
..p.s. Here's one on book 14 http://www.eurogamer.net/article.php?article_id=174167
p.p.s. Here's why I'm so freaking excited for it: http://www.lotro.com/article/562
if you read any of these read this last one though they are all good.