Flopped straight from SB...how do you proceed.

[jsnipes28]

Seat 1: c44sh ( $40.95)
Seat 2: tesla3605 ( $32.30)
Seat 3: MissZola ( $49.35)
Seat 4: efc1111 ( $49.40)
Seat 5: pok3r_is_fun ( $56.93)
Seat 6: SirVincent ( $51.50)
Seat 7: slips28 ( $96.70)
Seat 8: DRSpears ( $48.75)
Seat 9: ATHF01 ( $47.80)
Seat 10: mrmowen ( $46.75)
slips28 posts small blind (0.25)
DRSpears posts big blind (0.50)
** Dealing down cards **
Dealt to slips28 [ 2 [img]/images/graemlins/club.gif[/img], 4 [img]/images/graemlins/club.gif[/img] ]
ATHF01 folds.
mrmowen calls (0.50)
c44sh calls (0.50)
tesla3605 folds.
efc1111 calls (0.50)
SirVincent calls (0.50)
slips28 calls (0.25)
DRSpears checks.
** Dealing Flop ** : [ 5 [img]/images/graemlins/diamond.gif[/img], A [img]/images/graemlins/spade.gif[/img], 3 [img]/images/graemlins/diamond.gif[/img] ]

If u bet out and get a caller someone in late position is going to have good odds to call on a flush draw. If u check you risk giving a free card? Regardless of whether u check-raise or bet out, how do you play a non-diamond turn? diamond turn?

I'll post my actions after a few replies, i don't want to influence any posts by what i did.