OverDrive have announced that they will be discontinuing the sale of audiobooks in the WMA format, making all audibooks available in a DRM-Free MP3 format. The change will allow Overdrive to able to add the titles to the catalog quickly and then resell them to libraries, without a lull period of manually adding encryption.
The Overdrive press release is available here and the decision has also been discussed on the Good-Ereader blog.
ebooks in libraries advocacy 