From the BISG website:
Thanks to the work of its Content Structure Committee, the Book Industry Study Group is pleased to offer an important new industry reference tool… the EPUB 3.0 Support Grid, version 1.0. Designed to be a handy reference for EPUB content creators and business types alike, the Grid provides information on what enhanced functionality available in the IDPF’s recently released EPUB 3.0 standard is supported by which devices, apps, and reading systems.
Click here to download the Grid now.
Industry feedback is critical to keeping the Grid accurate and up-to-date. So we hope you’ll join the dialogue and send in your comments and suggestions for improving and enhancing the Grid. Send your feedback to email@example.com.
Thanks to FUTUReBOOK for the heads up.