Theodred posted this over on our message boards and I thought it was post worthy: Access Hollywood video-interviewed Sean Astin and Dominic Monaghan about their involvement in The Hobbit (among other stuff), and both said they’re probably not in The Hobbit.

Transcribed:

Laura Saltman: “it was just announced Elijah Wood is gonna do it, what about you?”
Dominic Monaghan: “I don’t think I’m gonna do it, because I’m not alive. The Hobbit is based a long time before Lord of the Rings, so we’re not born yet, where as Elijah I think is gonna do some stuff like flashback thing with Bilbo. I might go out with Elijah and just hang out on set and wave at people and say: employ me, employ me. But no, I’m excited.”
LS: “But what if they put some make-up on you, and make you just look not like you?””
DM: “Yeah, I could be like an orc or an Uruk-hai. No, I’d be excited to do that.”

Sean Astin

Transcribed:

Laura Saltman: “Speaking of The Hobbit, are you not part ot that, because you weren’t born basically?”
Sean Astin: “They could do whatever they want, but my character, Samwise Gamgee does not appear in The Hobbit story as it’s in the book, so, you know, I know that Elijah is gonna do it, I think I just read in the paper. I’m just kind of excited just to see how they’re gonna do it. They’ve got a lot of different ways to go about it. So yeah, I don’t think Samwise will gonna be there.”
LS: “You never know, you could put some make-up on, movie make-up and just be another character, right?”
SA: “I just crash the set,yeah, that’s what I’m gonna do.”