Beck needs to keep looking ahead and working on improving himself, but he doesn't have to watch his back. (kind of punny since they just got a new left tackle and quarterback) I seriously doubt Henne sees any playing time this year, whether they think he is their future guy or not. I don't think you can blame last year on the Dolphin QBs, and Parcels knows that. Foxsports has Henne on their list of 8 rookies (by round) who can make an impact this year.
http://msn.foxsports.com/nfl/story/8086910/Eight-rookies-who-can-make-a-difference-in-'08
But they also have Kehl on the list as well. I like the pronounciation guide for Kehl, and they call him "more mature than most draft picks" for having served a mission. Some good press.