It hasn't been made official yet, but the Mavs re-upped Jason Terry at a very reasonable price for the next six years. That made it possible to swap the electrifying (when-healthy) Marquis Daniels for balding Austin Croshere (note the rarely-witnessed comb-forward in Croshere's pic in the linked story above) and his magical expiring contract. In less stimulating news, they announced a deal with DJ Mbenga.
So, Croshere presumably replaces Keith Van Horn, Buckner and draftee Maurice Ager replace Daniels and Adrian Griffin. Free agent Darrell Armstrong has been the subject of absolutely no rumor-mongering thus far but should be on somebody's bench this year should he so desire.