He's obviously got a hand he likes, if I shovel, I can get about $35 in (basically all in) but will that cost us a customer?
Flat calling an option? I sure don't want to flat call and see a "paint" on the turn.....

Full Tilt Poker
Pot Limit Omaha Ring game
Blinds: $0.10/$0.25
6 players
Converter

Stack sizes:
UTG: $59.20
UTG+1: $10.30
CO: $18.15
Hero: $36.05
SB: $23.30
BB: $10.35

Pre-flop: (6 players) Hero is Button with A Q A 4
UTG calls, UTG+1 folds, CO calls, Hero raises to $1.35, SB folds, BB calls, UTG calls, CO calls.

Flop: J A 2 ($5.5, 4 players)
BB checks, UTG checks, CO checks, Hero bets $3.5, BB folds, UTG raises to $9, CO folds, Hero???

He probably has JJ. You're not massively worried about KQT, so make a smallish raise to $21 or so. I don't mind flat calling either.

He has at most 8 outs.

I don't like a shove because you give him every opportunity to get away from his hand.

When a guy check/raises the pot though, isn't he usually doing that as a test? He's probably decided already that he's either taking this one stab at the pot, OR that he's ready to get it all in. I don't think there's much in between to give value to a $20-$25 raise. If he'll call that, he'll call for $33. What about dah sexy min-raise?

Ship it all day. I would guess he has a weak holding and trying to take the pot away or a hand he is not folding. Either way I would make it expensive to see a turn.