AJs flop action?

[pottie]

UTG seemed like a solid player after only a few hands but no real read. The tabled played very loose and fishy, big pots with 2nd pairs etc. CO in this hand is one of the fishes, trying to win every hand. I'm loosening up a bit preflop to see if I can hit a big hand.

Party Poker No-Limit Hold'em, $ BB (6 max, 6 handed) converter

UTG ($545)
MP ($294)
CO ($1034.83)
Hero ($712.20)
SB ($1101.29)
BB ($244.20)

Preflop: Hero is Button with A[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/spade.gif[/img]. SB posts a blind of $2.
<font color="#CC3333">UTG raises to $20</font>, <font color="#666666">1 fold</font>, CO calls $20, Hero calls $20, <font color="#666666">1 fold</font>, BB calls $16.

Flop: ($82) 2[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
BB checks, <font color="#CC3333">UTG bets $40</font>, CO calls $40, <font color="#CC3333">Hero ??? and my plan for the rest of the hand?