Just announced on legal-talk
is that Phase 4
of the license change process is scheduled for this Sunday, 19 June
2011. During Phase 4, the 166,000+ contributors who have accepted
CT/ODbL will be able to edit. That is, the 406 contributors who have
declined CT/ODbL will not be able to edit after phase 4 has begun.
Those who have declined with their existing account may reconsider or
may open a new account to continue editing. Those who have already
accepted should be unaffected by the move to Phase 4.
If you have an unexpected problem with editing, please see #osm-dev on
 use your favorite IRC client for #osm-dev on irc.oftc.net, or the
web client at http://irc.openstreetmap.org