American Libraries has a short article today discussing the what is needed for various groups in accessible ereaders. As part of the article they list some resources to find indices of what ereader has what:
Any index of accessibility features may be out of date as soon as it’s published, but here are 3 excellent sources that have a good chance of being updated frequently enough:
http://wac.osu.edu/ebook-access-overview/
http://diagramcenter.org/index.php?option=com_content&view=article&id=24&Itemid=28#eb_hardware
