Blow already said in an interview that zero money was exchanged. Of course marketing and publishing on Sony's platform will be dealt by Sony, and that's a cost that Blow doesn't need to worry about. But, that was a given.
Well, Blow was basicly given a free pass on the fees in exchange for being a posterchild for their new publishing oppotunities. I expect Sony to give us more details at GDC regarding indie development on the PS4. I really hope they go the Apple way on this, but with a higher fee to access the development network.
I would gladly pay 200-500$ or more, in order to get a full SDK and the same tools as the professionals get without the advanced debugging features the expensive dev kits gives you, along with being able to test my software on a retail PS4.
The console development paywall really makes it hard for smaller developers to test their ideas on real hardware.
Actual publishing would still need a pretty high level of quality and therefore the payment to access the SDK should be high enough to keep a lot of the crapware developers off the platform (99$ is far too little).