According to Richard Durrett, Gerald Laird has been told that he and Jarrod Saltalamacchia will "split time evenly" behind the plate.
Personally, at this point, I'd like to see Chris Shelton called up to replace Ben Broussard, with Shelton and Botts splitting time at 1B, and Salty getting some time at DH (along with Botts, Bradley, and Cat). Shelton being a possible third catcher would make using Salty some at DH more palatable.