Button is a total donk, playing 83/33 and I'm pretty sure he'll pay me off if I hit, thus my call pre. SB is 20/10 over a small sampling, but hasn't gotten out of line that I've seen.

My thought is that button could have anything and SB isn't far behind (likely something suited but not good enough to reraise or maybe aq very low PP).

Should I be more worried by SB's checkraise and later all in? My guess was he was on the flush draw. Assuming that is indeed the case, I assume I have the odds to get it in (thoughts on how button remaining to act factors in to this?).

Full Tilt Poker $0.25/$0.50 No Limit Hold'em - 6 players

SB: $50.35
Hero (BB): $50.00
UTG: $51.05
MP: $67.25
CO: $19.20
BTN: $54.35

Pre Flop: ($0.75) Hero is BB with T 3
3 folds, BTN raises to $1, SB calls $0.75, Hero calls $0.50

Flop: ($3.00) T 3 4 (3 players)
SB checks, Hero checks, BTN bets $1.50, SB raises to $4.50, Hero raises to $12, BTN calls $10.50, SB raises to $49.35 all in, Hero ?

Yeah this spot kinnnddaa sucks if SB is a nit with draws but not much you can do except get it in. Expect to be raping over pairs, flush draws, and 34 a lot of the time.

pot flop yourself

100% standard call

depends on button cbet % imo

My personal experience is that these 75+/30+ people cbet a very high, if not practically 100% of the time, so going for a c/r yourself is fine. SB shoving over your 3bet and the buttons call is very scary. I put him on a very strong range here. Something like Th9h, 34, a set, 5h6h, Ah2h: a range against which we have 31% equity. 20/10 is fairly tight, and I typically don't see these guys 4bet shoving a naked flush draw in this spot. I'd expect to see 44 here a lot.

Depends on your read though. I probably fold here. We are however pretty much getting pot odds to call.

It is not good to raise after sb´s c/r.
Also fold pre, what are you expecting to hit with T3?

Agreed this should have been a fold pre.

Can you expound on your "it isn't good to raise after sb's c/r"?

Not saying you're wrong, just trying to understand why you say that and how you would prefer to see it played. Are you folding 2 pair? Just calling? What's your plan for the turn?

I'd fold pre. Can't fold now.