As far as I could tell the DbCL under which database contents are intended to be licensed post-move is intended to be a no-op, but I agree it is kind of confusing. Condition 2.2 of http://www.opendatacommons.org/licenses/dbcl/1.0/ says "You must comply with the ODbL" and http://wiki.openstreetmap.org/wiki/Open_Database_License#... says "This effectively means that end users of data published by the Foundation need to study only the ODbL rather than worrying about any special copyrights on individual elements of the database."
To what extent contents would effectively be covered by the ODbL and what that might mean in practice, I don't know.
Thanks for pointing this out. I thought I had some understanding of database/contents separation under ODbL/DbCL, but apparently not. Always good to learn of one's ignorance. :-/