A research team at the University of Washington released a report yesterday, and it pretty much repeated what we already knew.
(Most) eReaders don't work as digital textbooks. Specifically, this report rehashed the results of a pilot program that the UW ran iduring the 2009-2010 school year. Those results matched the results of virtually every Kindle DX pilot program. The KDX doesn't work as a digital textbook.
I'm still trying to figure out why this qualifies as news.