moses--- no chance for 2006
wainwright--- possible chance even though his numbers have not been very good at all this year for the cards... i have never considered him a great prospect,,, but he has been well known due to the drew trade with Atlanta.....
for overall,,, unless this is a real deep keeper league,,, i think i could find a few more players that could help you besides these 2....
I don't know much about the rest of your questions, but I do know that Wainwright won't be getting any action this year in the bigs. He may make the rotation next year, but a lot of things would have to fall just right: current starters leaving (Morris, Suppan), someone else in the rotation losing a spot (Marquis) or he completely floors everyone in the organization with his performance in ST.
-Yeah I agree on dropping Allison, so many things have gone wrong for him and he defiantly isn't close to showing up on prospect radars any time soon.
-Quiroz is alright, but McCann is a better catching prospect that you should defiantly pick up.
-Not a big fan of Wainwright, even if he does make it he is most likely a back of the rotation/#3 guy at best. I'd personally drop him and snag one of your prospects listed.
So, what I'd do is drop Wainwright, Quiroz, and Allison. That should leave 3 spots open and 4 if your trading Garko (assuming your not getting a prospect in return). I'd pick up McCann, Kendrick (IMO he will be better fantasy wise then Pedroia), Aybar and if you need another SP prospect go for Weaver. Duncan is also a good choice, should be a 1B in the future with nice power, if you want a 1B more then the other 4 listed.