I think the sum will have to be fairly substantial. The cost of involving support, or any kind of human contact, in the chain between needing a download and getting it is likely tens of thousands times more expensive than maintaining a self-service system.

It's the enterprise sales model, where software contracts are measured in megabucks, because to do anything cheaper would be more expensive than the cost of sales. I think relying on anything from Sun that Oracle can likely find a way to charge for would be foolish, unless you're big enough to afford those kinds of costs.