Amazon's last chance to catch up with Apple

If you think Apple is a pretty big deal right now, you've seen nothing yet.

No one's really talking about last month's digital-textbook initiative, where Houghton Mifflin Harcourt, Pearson, and McGraw-Hill agreed to offer interactive iPad editions of their classroom classics for no more than $15 a pop. However, all around the country, school administrators can't stop yapping about it.