river decision -- jam or call?

[tannenj]

villain is mchar. he's clearly 2p2, but i don't know who it is. i have him at about 20/16/4 over 800 hands. he uses position well and makes moves liberally. he likes to raise my cbets. when he raises the flop here, his most likely holding is some kind of air.

what do you think of my play so far? as played, do you shove the river or just call? what do you put him on?

Full Tilt Poker
No Limit Hold'em Cash Game
$1/$2 Blinds
6 Players - (LegoPoker HH Converter)

SB: $195.75
BB: $259.95
Hero (UTG): $407.85
MP: $616.45
CO: $197.00
BTN: $213.70

Preflop: Hero is dealt 6[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/club.gif[/img] (6 Players)
<font color="red">Hero raises to $7.00</font>, 2 folds, BTN calls $7.00, 2 folds

Flop: ($17) K[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">Hero bets $12.00</font>, <font color="red">BTN raises to $36.00</font>, Hero calls $24.00

Turn: ($89) J[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, BTN checks

River: ($89) T[img]/images/graemlins/club.gif[/img] (2 Players)
Hero checks, <font color="red">BTN bets $89.00</font> (he has $81.70 behind)