There's no uncertainty at the QB position, unless you're talking about whether or not we're going to cut/trade Harrington. Lemon will almost certainly see a promotion to the #2 spot, based on both his performance this past season and favoritism by Cameron. Culpepper is still our #1 QB, guys.
I would hope that Cameron tries to trade up for Joe Thomas, or rolls the dice with Levi Brown, to solidify the Left Tackle position for the next 10 years. If Ronnie is expected to rush for 1500+ yards next season, he's going to need more than half a line to run behind. (Most of Ronnie's yards this past season came from running right, behind Shelton and Carey.) Levi Brown at Left Tackle, and Toniu Fonoti at Left Guard (presuming he doesn't flake out like he normally does) would really shore the line up.
I expect a winning season, though not necessary a wild card spot--we've got a more difficult game schedule in 2007 than we had in 2006. And I'm afraid that if we get a wild card spot in 2007, it'll inflate expectations beyond a reasonable degree for 2008. If Cameron fixes the line, I expect at least 1400 yards out of Ronnie. As far as Culpepper goes, he should be back to form, and we'll finally see the first great QB in a Miami uniform since Dan Marino.