SB in this hand is pretty good, and I think his range is widish. Button is tight/passive preflop, loose/passive post flop, likes to overplay top pair; I think his limp is more a sign of weakness than trapping. If I call he is guaranteed to call too, push is another story.
Edit: I looked back at the HH and fixed the description of Button.
PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (3 handed)
pokerhand.org hand converter
Button (t7350)
SB (t1615)
Hero (t4535)
Preflop: Hero is BB with 8[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/spade.gif[/img].
Button calls t200, <font color="#CC3333">SB raises to t600</font>, Hero ????