At first glance I don't see this trade being in your favor.
Cuddyer is 2B eligible, and I see you are playing Weeks right now. the A's don't know if Weeks will continue to play once Mark Ellis comes back off the DL, so assuming he does not play, you are left with no one at second(Izturis can play 2nd, but then you have no one at 3rd.)
You got Tabata in the trade, but you have a few outfielders already. Blackmon has the tools to to closely mirror Tabata's numbers. Because of this I feel as though you got a semi-worthless player for your team. If you were short on outfielders sure, but you have a few capable players.
I guess you can say you picked up saves. i hate trading for saves though, you can always pick some up off the FA market down the road. Does your league count holds? if so then this trade was really bad for you, sorry to say.
PS - You have a lot of SS, should try to trade one of them for a 3B.