Was this a bad beat or should I have played it differently?

[fervent]

I'm on the big blind with 68o, the board calls to me and I check. I get the flop of a lifetime: 579 rainbow. I bet 5 big bets and get raised. I re-raise, then I get re-raised. I put him on three of a kind and call his all-in. He had pocket 9s and pairs the board for a boat.

I think I'd play the hand the same way again, but I thought I'd solicit some other opinions.

Thanks.

[Nottom]

Its hardly a bad beat to have a straight run down by a set. I'm just wondering how it took 4 (or was it 5?) raises for someone to get all in.

[bisonbison]

you are ahead on the flop. He has many outs. That's all that happened. Most of the time you win. Sometimes you lose. Calling an all-in when you have the nuts is generally +EV.