The New York Times discusses Calibre as its "weekly tip" in some detail in the Tech Talk podcast dated July 22nd.
The comments are very positive. It's discussed in the first few minutes of the show, so you don't have to listen to the whole 32 minute podcast:
http://dts.podtrac.nytimes.com/redir...22techtalk.mp3
Excerpts:
"Open-source, cross-platform - are there no more beautiful words in the English language?"
"It's obviously a program that was built with a lot of love."
"... funky spelling: c a l i b R E."