BB vs SB, nobody showing strength

[luckyplayer]

Party Poker No-Limit Hold'em Tourney, Big Blind is t50 (7 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

MP2 (t870)
CO (t1630)
Button (t2530)
SB (t735)
Hero (t550)
UTG (t1245)
MP1 (t440)

Preflop: Hero is BB with 3/images/graemlins/club.gif, A/images/graemlins/heart.gif.
<font color="#666666">5 folds</font>, SB completes, Hero checks.

Flop: (t100) 4/images/graemlins/club.gif, 7/images/graemlins/heart.gif, Q/images/graemlins/heart.gif <font color="#0000FF">(2 players)</font>
SB checks, Hero checks.

Turn: (t100) 6/images/graemlins/diamond.gif <font color="#0000FF">(2 players)</font>
SB checks, Hero checks.

River: (t100) 2/images/graemlins/heart.gif <font color="#0000FF">(2 players)</font>
SB checks, Hero checks.

Final Pot: t100

Should I bet at some point here? I feel like these come up fairly often. I basically never bet here unless I hit two pair. I either win or lose a showdown or a min bet gets me out of the pot.

I'm curious as to how others handle such situations.

[Big Limpin']

Toss T50 at the flop. It doesnt matter what you have.

[valenzuela]

Raise preflop?

[curtains]

I move allin preflop, I bet flop every time in random partypoker tournament (bet about 60-75). They will fold 70% of the time at least. This makes it a pretty easy math question as to whether or not you should bet the flop, as they don't need to fold nearly this often to make it +ev.