Internet is around 28 min. Watch the whole thing. It is great
Notice how he sounds more human to the phone than to normal interviews. This phone call conversation reminds me of the stuff I keep reading about in (a great book) called The Age of Turbulence by Alan Greenspan, where Alan is speaking to this or that man about this or that subject.
Although it supports unprotected Mobipocket books (.MOBI, .PRC), plain text files, and HTML and Word documents, Kindle also uses its own proprietary, DRM-restricted format (AZW).
It does not fully support Portable Document Format (PDF)
Many reviewers have expressed concern with the ergonomics of the Kindle.  Without its cover, it is difficult to hold onto without accidentally pressing one of the buttons.