Chapter 452 is up!
http://www.onemanga.com/Naruto/452/01/
Summary: Naruto and Sakura want to barge in and ask Danzo what's the big idea, but Kakashi tells them to keep their cool. Sai and Danzo meet and has Sai keep tabs on Naruto. Sai runs into Sakura and Naruto who try to get information from Sai about Danzo but turns out they can't because of a seal on Sai's tongue. They are then attacked by Kumogakure ninjas that want information about Sasuke.