Amazon relased Kindle in November 2007. Immediate to its release it grabbed enormous attention in he blogosphere- which eventualy faded away soon.
We leave this for your discussion -
was kindle a Hype? The meteorite growth & subsequent catastrophe of "Kindle" in blogoshphere - we have captured
here.
Also going by 2007 eBook download data -its sure Kindle is
not most popular book format -
http://www.swivel.com/graphs/show/25808741