Things are quite different now.
Ferals did pretty good damage in BC, about on par with rogues minus poisons... of course when the wrath "3.0" patch rolled around rogues got their massive evis damage.
In wrath (in 49s), feral druids have fallen behind in terms of overall damage and utility. They lost their ability to powershift (Furor change), and are one of the weaker offhealers for their offspec.
As Flag Carriers, I would still take a Warrior (Shield Wall, Last Stand, decent damage) and Paladin (dispel, hand of freedom, HoJ, etc) over a feral druid.