According to this ESPN link, Miggy is finally getting out of Baltimore and heading to the Astros.
The Orioles get Luke Scott, pitchers Matt Albers, Troy Patton and Dennis Sarfate, and third baseman Michael Costanzo. The only one I know of is Scott, who's supposed to be pretty good.
Anyway, this will probably result in subsequent trades of Roberts and Bedard by the Orioles. To me, this will set the market for possible trades of Dan Haren, Joe Blanton, and possibly Mark Ellis if Beane decides to blow the team up and look towards Fremont.