Both the Android and iOS app were updated today. The Android app got a new UI and the ability to lock orientation. The iPhone app got performance enhancements and the ability to read third party Epubs.
In other news, Overdrive have updated the Virtual Branch website. You can now search and download ebooks from Project Gutenberg (DRM-free). Eh. I've been bugging them about adding other sources (Feedbooks, for example). The automatically converted ebooks at PG are some of the worst I've seen anywhere.