Ah, the mediocrity of non-news news.
It draws to mind the middle-school taunt: "No sh**, Sherlock".
One of these days, maybe we'll find out WHAT the offers were.
My guess is that Lewis' deal is two years, probably more pay than the $5M he got for 2007. Not purely because he's worth it, but partially out of respect for him (all reports are that he's been a great addition to the locker room), and anticipation that in free agency some talentless team (Dolphins, Falcons, steelers) would offer him enough money so that he would agree to play for a crappy team.
Anderson's is probably a bit longer term, but a bit less money. Since they still have the fall-back of the restricted free agent thing, and since he's still more of an unknown commodity, that would seem prudent.