You can now by O'Reilly books a chapter at a time (an outgrowth of technology originally developed for SafariU). Meanwhile, Pearson (who own Addison-Wesley, Prentice Hall, Peachpit, and a bunch of other imprints) has launched a Short Cuts series with the same format and remit as O'Reilly's, and is offering tech tutorial videos as well. Us educators better start gettin' educated...