A few sites that I recommend reading and that I personnaly follow

• www.rolanddyens.com
  Official Website of Roland Dyens, guitar concertist and composer, undisputed actual master of classical guitar.
• www.guitareconcert.com
  Very interesting, well architected and content-rich Website of a fine collector of top-notch concert classical and flamenco guitars.
• www.classicguitar.com
  Merchant Website of Chris Kamen, a well-known US dealer dedicated to high-end concert classical and flamenco guitars.
• www.delcamp.fr
  Forum entirely dedicated to classical guitar, offering a lot of resources for guitarists of all levels.
• www.laguitare.com
  The first portal of resources for guitarists and guitar makers.