Completely Lost with AA

[Pasterbator]

Situation: $5 rebuy on Party. Late in the 2nd hour (after the rebuy period) Blinds are 150/300. Limper has been limping pretty often. A guy typed that the limper was VERY lucky to still be there.

***** Hand History for Game 2915902652 *****
NL Texas Hold'em Trny:16791550 Level:8 Blinds (150/300) - Saturday, October 22, 18:37:53 EDT 2005
Table Multi-Table R+A(492811) Table #3 (Real Money)
Seat 1 is the button
Total number of players : 10
Seat 1: xxx ( $10024 )
Seat 2: SB ( $7926 )
Seat 3: xxx ( $6870 )
Seat 4: xxx ( $4197 )
Seat 5: xxx ( $2700 )
Seat 6: limper ( $11610 )
Seat 7: xxx ( $6826 )
Seat 8: Pasterbator ( $9860 )
Seat 9: xxx ( $8815 )
Seat 10: xxx ( $2748 )
Trny:16791550 Level:8
Blinds (150/300)
** Dealing down cards **
Dealt to Pasterbator [ As Ac ]
xxx folds.
xxx folds.
Limper calls [300].
xxx folds.
Pasterbator raises [1200].
xxx folds.
xxx folds.
xxx folds.
SB calls [1050].
xxx folds.
Limper calls [900].
** Dealing Flop ** [ Jh, 7h, Td ] Pot is about 3600
SB is all-In [6726]
Limper calls [6726].
Pasterbator pukes and ??

Am I ever ahead here? If they are both on draws, am i even a favorite to win? These things ran thru my head in the 15 seconds Party gives you to react.

Whats the play?