Okay guys, i'm back from my 2 week vacation.
Good way to come back to a new Naruto chapter.
Link: Naruto 645 - Read Naruto 645 Online - Page 3
Edit: So... story line-wise it made very little to no progression. However... Naruto-wise, this is a HUGE leap in terms of power. I honestly saw this coming since the Pain arc, but Naruto can finally use Sage mode and Kyuubi chakra simultaneously.