I've just learned that Mayor Fenty will be holding a press conference tomorrow, May 18th at noon to discuss the rebuilding plans for the Market; it'll be at the same place as his last one, on the plaza in front of the North Building (at Seventh Street SE and North Carolina).
Unfortunately, there's literally no way for either of us to be there -- I've already put a request into a friend who might be able to go and pass on the scoop, but if you're sure you'll be able to go as well, please let me know and I'll try to get an update up as soon as I get the info!