From the press release:
OverDrive, a leading distributor of eBooks, audiobooks, and digital content for libraries, schools, and retailers, announced that it will release a series of apps that will combine eBooks, audiobooks, and interactive and multimedia content into one user-friendly application. The apps will be available for both mobile and desktop operating systems, including Windows®, Mac®, iPhone®, iPad®, Android™, Windows Mobile®, and BlackBerry®. Millions of end users will benefit from a single software solution for all OverDrive-supplied content, as well as on-the-go access to eBooks from OverDrive-powered library and retail catalogs.
I don't have any details yet, but I'm hoping that these apps will work with all Epub ebooks, not just the ones from Overdrive. There is no option at this time for reading Adobe DRMed ebooks on Android, Blackberry, or the iPhone.
I'm going to follow up on this next week at Book Expo America.