There are many more products, for cost or free, on the PC side than on the Mac side, this blog is devoted to AT on Mac OS X. May be a resource for keeping current with new products and development on this platform.
This site describles a project to convert as many picture (trade) books as possible into Intellipics, or Clicker, following a designated template so the books are accessible to students with multiple challenges. This was a great presentation at CTG 2007.
This is from the state of Utah. There are recommendations for keyboarding programs, expectations for different grade levels, and instructional suggestions.