[bobi]

It must authentic.

It was probably made in house.

[B-bone]

Here's a buy-your-tin-foil-by-the-gross alert theory.

OBL is in custody in Diego Garcia. We need a final nail for Saddam. We arrange for OBL to make a tape implicating Iraq. Powell knows about tape and its contents prior to it being broadcast or even being offically acknowledged.

Screwy theory? Yes.
Likely? Hardly.
It's been a slow afternoon and the mind is idle? Certainly.
He's dead? More likely than the above theory.