Sam spoilers from Kristin
taylor_b22: Glee scoop! Please tell me Sam & Rachel is not happening!
As of right now, we can tell you Sam and Rachel is not happening, but Glee productions rolls on everyday, so we can't say it'll never happen. If those two do get together, then from what we understand based on other storylines, it'll be a big twist that would cause a lot of problems for others besides Finn. We think it would make more of a mess than what the shock is worth, but Ryan Murphy certainly does love to make things sticky.
Source
So, this basically confirms that Sam is not going to be hooking up with a new girl anytime soon, as Rachel was pretty much the last possible female choice. That's good news.
Also, Kristin sounds butthurt over the big twist that's coming up. Interesting reaction, considering she's a hardcore Klainer. :)