first hand of tournament, overall comments needed

[frostbrn]

pokerstars $20+2, very first hand of the tournament. No previous reads or info on any of the players

PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (9 handed) converter

Hero (t1500)
CO (t1500)
Button (t1520)
SB (t1480)
BB (t1500)
UTG (t1500)
UTG+1 (t1500)
MP1 (t1500)
MP2 (t1500)

Preflop: Hero is MP3 with A[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/spade.gif[/img].
UTG calls t20, <font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises to t80</font>, CO calls t80, Button calls t80, <font color="#666666">2 folds</font>, UTG calls t60.

Flop: (t350) 4[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
UTG checks, <font color="#CC3333">Hero bets t280</font>, CO folds, <font color="#CC3333">Button raises to t1440</font>, UTG folds, Hero ?????


Here's what I'd like to know:

1) how does everyone like my preflop raise? not enough?

2) how about the flop bet? With that many callers I'm a little unsure about how to play it being so early to act.

finally 3) is this an auto call (of the all in reraise) with no reads? what range of hands could I put this reraising pusher on?

Thanks in advance for the comments.