Whirling Frenzy + Bear warrior?

[BIGMamaSloth]

I'm making a barbarian/bear warrior right now, and the rage variant whirling frenzy caught my eye. It gives me another attack when I rage. How would this work when combined with the bear warriors natural attack routine? I know iterative attacks don't count for natural attacks, but would this give me an extra attack still? and with what natural weapon? I would have posted this in the RAW 3.5 thread but was worried it might cause a debate.

[Flickerdart]

It would give you an extra attack with any weapon you are currently holding. Since it's not part of an iterative routine, the rules don't care which one.

[Keld Denar]

What happens when you cast Haste one a bear? It gets an extra attack. This is no different.