Sue Polanski was at the ALA Conference last week and she recorded an interview Dan Stasiewski, Public Relations Manager at OverDrive. She asks Dan about the new WIN platform and the other enhancements which OverDrive will launch in a few months. Dan provides some details on DRM, formats, patron-driven acquisition, and simultaneous use titles.
Dan’s interview (along with 40+ others) is available here. I think it's worth a listen; it should add some nuance and detail to the vague details released concerning OverDrive's future plans.