Top Set hits a bad board, river?

Hollywood Poker, 25NL. 10/25 cent blinds.

Just sat down, second hand in.

SB: 50.20
BB: 27.70
UTG: 5.70
MP: 28.75
CO: 113.05
Button: 25.60

Hero has the button and gets dealt 9 [img]/images/graemlins/heart.gif[/img] 9 [img]/images/graemlins/diamond.gif[/img].

Preflop:
UTG folds, MP calls .25, CO calls .25, hero raises to .75, SB folds, BB calls, MP calls, CO calls.
(Looking back I know I probably should have raised a bit more - comments?)

Flop: (4 handed, Pot = 3.15)
5 [img]/images/graemlins/spade.gif[/img] 8 [img]/images/graemlins/heart.gif[/img] 9 [img]/images/graemlins/spade.gif[/img]
BB checks, MP checks, CO checks, Hero bets 1.75, BB calls 1.75, MP folds, CO folds.

Turn: (2 handed, Pot = 6.65)
10 [img]/images/graemlins/club.gif[/img]
BB checks, hero bets 3.50, BB calls 3.50

River: (2 handed, Pot = 13.65)
6 [img]/images/graemlins/diamond.gif[/img]
BB checks, hero checks.

I thought about putting out a bet on the river but I saw to many hands that beat me. Comments on any street are welcome but I am more concerned with my river play. A check here is pretty standard?

I will post results later.