Andrew Zack explains the process and costs of eBooks in Making E-books Is Harder Than It Looks.
Espresso-machine eBooks - The Antidote to e-Books
Everything in moderation: Enhanced ebooks are bad for children finds American study
Pew Poll shows 62 percent of American readers didn’t know if their library had e-books for lending. That and other survey stats at Most U.S. readers unaware of e-books at libraries: poll.
Ottawa’s Public Library has offered e-Books since 2010 and demand has skyrocketed although they still tackles challenges: Despite technical issues, e-books a best seller for library
After a pilot project, all 17 branches of the Edmonton Public Library will be lending e-readers to their patrons: Library Opens New Chapter With e-Readers. (I wonder which ones they bought?)
Read Books Online seems to be a fairly decent portal to the world of electronic literature delivery.
A very extensive indexed list of sources for online books can be found at The Online Books Page.