I remember a time where we were short on centres

Yelle
Langkow
Conroy
Nolan
Lombardi
Primeau

Who is going? Who is staying? What are we getting?

Let's have some late-night fun with these questions:

Primeau: Seeing as he just signed a new contract, I'd reckon he's staying. (Projected: 4th line)
Nolan: Seeing as he just signed a new contract, I'd reckon he's staying. (Projected: 3rd line) [Edit: He's a RW, not traditionally a centre. My bad.]

That leaves us with two more starting centers to place, and four players: Conroy, Langkow, Lombardi, Yelle.

Lombardi: I have to believe he's staying, because I love him. The other part of me thinks he's probably going to be traded. Lombardi was never really a Sutter type of player...and he's certainly not a Keenan type of player. Plus after the Conroy acquisition he's sort of been the odd man out. [Edit: Seeing as Nolan's not really a centre, I say Lombardi stays.]

Yelle: I love the guy, but I think Primeau's liable to replace him, seeing as he's younger, potentially more durable. A lot of teams could use Yelle's PK expertise and leadership, so he may be moved. My prediction is he is going to be moved this summer.

Langkow: He's going to stay. (Projected: 1st line)
Conroy: He's going to stay. (Projected: 2nd line)

Now, I'm well aware Primeau is also listed as a LW...so potentially one of these guys can stay for 5 centres. But 6? There's no way. Expect a trade.