Useful links
http://www.classicalguitarschool.net/en Eythor Thorlaksson's site.
http://fuoco13.narod.ru A russian site with a lot of scores.
http://gallarda.narod.ru Nikita Boldyrev's page.
http://www.scribd.com/search-collections?docs_count=&limit=10&query=classical+guitar Where you can find a lot of publications if you upload some of yours.
http://www.ryujikunimatsu.com A japonese guitarist's site; very nice transcription of Piazzolla's pieces and some of his compositions.
http://www.stringsandbeyond.com/clasguitstri.html A very good place where you can order your strings.
http://imslp.org/wiki/Category:Composers An enormous site of classical music scores.
http://www.thomaskoenigs.de A german guitarist's site.
http://www.sheetsearch.com A lot of classical music.
http://www.robertguitars.com If you're looking for a very good guitar, the canadian luthier Mikhail Robert offers you guitars better than mines but not a the same price!