I have not heard anything from the designers but FFG have pushed back the release date to December on their site.
Since playtesting/tunig of the the final part of the expansion (the Gondor game) is still happening I believe it will be impossible to reach the set release for October, but if it will take as long as till December I don't know.
Don't take this move of release date to heavliy since in the end the game will be better instead of rushed and worse.
I just read on BoardGameGeek.com that the games were shipped from the German factory last Friday. They're being shipped to the US by container ship and should arrive here in 3 to 4 weeks. So I'm guessing we're looking at the end of April / first of May until the games are readily available at retailers.