As a minor note, I believe LeVoir would be an RFA next year.
More importantly, Guyton will be an ERFA next year, so there's no rush to extend him.
That's part of why I had them further down in my list.
My point is that while we have around 26+ potential FAs after 2009, only about 1/3 of them are "core" players who we would obviously want to resign now. With older players, players with injury histories, and players whose salaries may exceed their value like Faulk, Neal, Galloway and Green there's no sense to decide if they are worth keeping beyond 2009 at this juncture. Many of the others either need to prove their worth or may not even make the roster: Wendell, Titus Adams, BJGE, Connolly, O'Callaghan, Britt, Yates, Hochstein (who arguably could fall into the end of the group above) Tank Williams, Ventrone, Ciurciu, Walter, Hanson, Hodel, Dave Thomas, Ben Watson, Lenon, Aiken, Alex Smith, TBC and Pierre Woods. There's certainly no need to move aggressively to extend any of these guys during the regular season.
That leaves 3 big money contracts (Wilfork, Seymour and Mankins), 2 RFAs (Guyton and LeVoir), 2 potentially largish contracts for veterans who haven't shown whether they will produce in our system (Burgess and Bodden), and 2 important role players (Kaczur and Gostkowski). As others have mentioned, Kaczur is probably an easier extension than Ghost. Whatever his deficiences, he has value as a cost-effective RT/swing tackle/possible OG, so I could see the FO wanting to lock him up for reasonable $ early on and have one less core player to deal with.
