Unusual straight draw situation

[BZ_Zorro]

Just sat down, etc. UTG and UTG+1 seem like OK players from limited observation.

Party Poker No-Limit Hold'em, $ BB (9 handed) converter

UTG ($96)
UTG+1 ($163.45)
MP1 ($94.2)
MP2 ($99)
MP3 ($164.5)
Hero ($103.25)
Button ($46.35)
SB ($96.5)
BB ($20.75)

Preflop: Hero is CO with 5[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/spade.gif[/img]. SB posts a blind of $0.5.
UTG calls $1, UTG+1 calls $1, <font color="#666666">1 fold</font>, MP2 calls $1, <font color="#666666">1 fold</font>, Hero calls $1, Button calls $1, SB (poster) completes, <font color="#CC3333">BB raises to $3</font>, UTG calls $3, UTG+1 calls $3, MP2 calls $3, Hero calls $3, Button folds, SB folds.

Flop: ($22) 4[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
BB calls $16.75 (All-In), UTG calls $16.75, UTG+1 calls $16.75, MP2 folds, Hero ...?