PS - Froogle won't be commercial. They'll use adwords and then sponsored listings at the top.
I'm not sure where they'll get those paid listings, but CJ or other affiliate programs may be an option or perhaps they'll just develop the technology themselves.
I, for one, think froogle is cool. I don't think it's going to take over the world, but it's a cool little tool. I just need to figure out how in the world to optimize for it.