If you don't have it already download pokerstove. Apparently I'm not smart enough to put the numbers on here but roughly A9s vs 2 random hands:

A9s- equity: 45% wins 44.37%

random hand- equity 27.5% wins 26.9%

random hand- equity 27.2 % wins 25.85%

As rough idea over 22,713,393,780 hands

So pushing dosen't seem horrible, you're short stacked and have an M of about 5, you're going to need to move soon.

Originally Posted by Pok 7's

As rough idea over 22,713,393,780 hands

Rough like the sun is luke warm.

Well you said A7+ and KJo+. I really think Any ace calls in these spots, so I'm going to open it up to that, and include pairs. I'm totally ignoring fold equity, so these numbers represent if you get called by ONE player. Considering they are only calling with about 1/4 of the hands, you already have about 50% equity to start (25% each player, ok it's actually 23.1%), but if they do call:
419,514,480 games 0.911 secs 460,498,880 games/sec

Board:
Dead:

equity (%) win (%) tie (%)
Hand 1: 51.1201 % 46.18% 04.94% { As9s }
Hand 2: 48.8799 % 43.94% 04.94% { 22+, A2s+, KJs+, A2o+, KJo+ }

Soooooo.... 50% of the time you win 500. 25% yer out, and 25% of the time you end up with a stack of 3700.

I'm tired so I'm leaving this too you TA to do the math....

Ok... I gotta do this... it's like a unoccupied jigsaw puzzle...

50% we have a stack of 2100 = 1050
25% we have a stack of 0 = 0
25% we have a stack of 3700 =925

Total that up, so our EV for pushing is an ending stack of 1975, which is greater than our folding stack of 1600, so we have to push here. I'm not even considering calling here, even half bets are too valuable to squander on bad flops.

I'd say fold, unless UTG is a habitual limper. If not, then 5 handed this usually is a trap too often to justify pushing this hand.

At this stage of the SNG, you're really just looking to steal pots, not see flops. If you pick up a monster, then you want to trap them for all their chips. Otherwise, the cards don't matter much(unless you pick up a 5-handed monster) - it's their VPIP, stack size, and your position and stack size that matter.

I keep looking at your position = SB. Next hand your on the button with 3 hands before the blinds catch up to you again.

Next I look at the table = only 5 players w/ UTG limping and BB to go. isn't exactly prime time but still a pretty good hand at a short table. Unfortunately w/UTG limping you have lost first vigorish for a steal but you should also be looking to double up!

Then I look at your cost - 1/2 bb to call so your getting 5-1 pot odds.

Like Jason said UTG may be trapping but we don't know that yet - BB could have AA too! While Marm wasn't even considering calling here I certainly would be. It only cost your 100 and if you hit the flop then go all-in even on a flush draw. Otherwise fold and see what the next three hands bring before you're into the blinds again. Even after this hand if you don't invest anymore into the pot you still have 5M and while short it still has fold equity if you also have first vigorish. Fact is when your SS you have to gamble to stay in the game. Last night I went from chump to champ at 75/150 level with a short stack of 450 (thankfully I had a couple of sherriffs double me up a couple of times before I hit the final table with 2500 in chips) and once I called pf from the blinds w/K-T and went all-in on the flop with top pair of tens vs 2 opps.