Quick introduction http://www.i-violins.com/How_to_Play_the_Violin.html
Beautiful introduction http://www.pohutukawa.com/orchestra/violin/
Portal on musical pedagogy http://www.musicalonline.com/pedagogy.htm
Korean violin masters http://www.violinstory.com/eng/main-e.htm
A complete online guide http://www.violinonline.com/violinbasics.htm