In 1998, the Brisbane Broncos won the NRL premiership.
In 2003 the best team in the NRL won the premiership and that is the Penrith Panthers :D (They will also win the 2010 premiership)
Melbourne Storm beat the Dragons to win the premiership
They have won the NRL premiership twice as of 2010.
The Warriors have never won the NRL. They won the minor premiership in 2002.
Manly Sea Eagles