[betgo]

I'm not Fossilman, but here goes.

Why would you want to raise with hands like medium pairs, medium aces, and suited high cards? If there are a bunch or limpers, these are good hands to limp with. These hands play well in a multiway pot. They are hands you would usually raise with if it was passed to you in late position, but they are hands you would pass with in a lot of situations. You have no reason to believe that your hand is better than those of the limpers in the pot. I would only raise if I thought I could steal the pot.

With AJ or AT, you could raise limpers from the CO or button, but as you say you are out of position in the BB after the flop. I would generally fold A9 or less in this situation unless it was suited. With limpers in the pot, I would usually call with any suited ace.