Jeremiah Bornemann writes in with the generic reply to those who emailed the MPEG-LA regarding the MPEG-4 license terms:
This is just the beginning. The licensing terms were just announced on January 31, and the details of the MPEG-4 Visual license agreement are still being worked out. Because of the challenge posed by the effort to produce a joint licensing program requiring a consensus among at least 18 different patent owners and the yet undetermined future implementations and applications of the emerging MPEG-4 Visual technology, this may take several months to complete. There will be much discussion before all of this is sorted out, and changes may be expected. Again, we appreciate your contribution to this process and will keep you informed.
Full text included in the comments.