According to what I've read, the team will announce something on Thurmond today. If he wasn't dropping the appeal, then there would be no announcement, since they'd have to wait for the conclusion of the case. This tells me that it's 99% sure he's going to be officially suspended for the Saints game and scheduled back for the Rams game and the playoffs.
As far as browner is concerned, we were not likely to see him this season until the playoffs anyway, so he is free to appeal, but I wouldn't be surprised if we IR him while he does what he needs to do, to free up the roster space for someone who we can get groomed for the playoffs.
My prediction is we see Thurmond suspended for 4 weeks and Browner IR'd while he sorts his stuff out and then we bring Shead up from the PS and sign someone (I'd guess either Cox or Winfield) and then we have a little extra security in case of in game injuries.