i've only played 26 hands against villain but he's running 19/0/5, so the limp call does not indicate set-hunting nearly as much as i usually infer (also 3bets 11%).

i'm never folding to min raise obviously, but is the turn a good bluffing opportunity?

Full Tilt Pot-Limit Hold'em, $0.10 BB (5 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

SB ($4.75)
BB ($6.83)
UTG ($28.70)
MP ($12.85)
Hero (Button) ($18.85)

Preflop: Hero is Button with ,
BB calls $0.10, UTG calls $0.10, MP calls $0.10, Hero bets $0.60, 3 folds, MP calls $0.50

Flop: ($1.50) , , (2 players)
MP checks, Hero bets $0.80, MP raises to $1.60, Hero calls $0.80

Turn: ($4.70) (2 players)
MP bets $1.70, Hero???