Multi-way pot with a flopped straight-flush draw

[nolanfan34]

Hey all,

Here's a hand that I didn't play, but read from someone else. Wondering what people think, I had one gut reaction instantly, but the discussion that evolved made me rethink my thoughts.

Here's the hand.
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$10 SNG on Party.

The table was unusual for these SnGs in that there was a lot of limping and not much preflop raising.

Seat 1: null2 (1025)
Seat 2: Bob (413)
Seat 3: Joe (1735)
Seat 4: Sam (1261)
Seat 5: HERO (750)
Seat 10: null1 (2816)

Sam posts small blind (25)
HERO posts big blind (50)

** Dealing down cards **
Dealt to HERO [ 7 [img]/images/graemlins/club.gif[/img], 9 [img]/images/graemlins/heart.gif[/img] ]
null1 folds.
null2 folds.
Bob raises (100) to 100
Joe calls (100)
Sam calls (75)
HERO calls (50)
-- Pot has 400

** Dealing Flop ** : [ 9 [img]/images/graemlins/club.gif[/img], 8 [img]/images/graemlins/club.gif[/img], T [img]/images/graemlins/club.gif[/img] ]
Sam bets (85)

I have 650 chips and the pot is now at 485. What should I do?