Jobs already said free apps are distributed for free
"though it may lose a fair bit of freeware that way on the principle of the thing - but the company isn't really interested in freeware..."
Jobs mentioned in the announcement that freeware apps will be displayed and distributed completely free so I think Apple is really interested in freeware. In fact Jobs went out of his way to point out that freeware is what would stimulate more interest in the platform.