Paston and Greeny - 34 and 33 next year but I think both are good for another season. I hope Vuko stays and eventually takes over from Paston but I think he'll move on (unless he gets some serious game time) so we'll need to start thinking about life after Paston and Vuko.
Sigmund and Brown - both will be 31 going in to the 2012/13 season - they weren't the quickest players in their 20s. Nevertheless solid signings as both good (actually outstanding) club men (as are Greeny and Paston) and will be useful squad members as younger players are hopefully introduced.
Pav - For Greeny, Paston, Brown and Sigmund it was always going to be a buyers market but I was worried about losing Pav. I think he has plenty of potential which hopefully he will realise over the next couple of seasons. No longer a youth player so he'll need to step up and prove he deserves the "adult" squad spot.