MarkAble 0.2.2 Beta ($15) from iPodSoft allows you to convert longer MP3 or AAC files into bookmarkable m4b files. “MarkAble merges selected files, instructs iTunes to perform an AAC conversion on the merged file(s), renames the files from the AAC conversion m4a to m4b to make bookmarkable, writes the converted file into your iTunes Music folder, and adds the converted files to the iTunes Library, now in a bookmarkable format.”
LC Angell
LC Angell was a senior editor at iLounge. Angell is known for her work on various aspects of the Apple ecosystem, including iPhone, iPad, and iPod. In his role at iLounge, Angell was responsible for a wide range of editorial content, including reviews, buyer's guides, news, and features.