If Amazon wants a share of the education market that said "No" to the DX but "Yes" to the iPad they're going to have to do more than add wifi to the DX. But maybe they've decided they don't want to be in that market after all.
http://www.azcentral.com/business/ar...textbooks.html
http://www.nytimes.com/2011/01/05/ed...05tablets.html