Weblogs.Us is a service that “helps people freely blog”. It is a hosted service, which is currently the home of about 800 MovableType blogs. Come November, all these blogs will be upgraded to WordPress.
The upgrade announcement expresses joy at WordPress’ wonderfully open and free licence, among other things. In any case, after the upgrade to WordPress, the maintainers of weblogs.us will not have to worry about having to pay fees on some future date.