Hi! I recently found your site and it’s great. Thank you!
I’m a very fan of quotes myself. I do the same as you, leaving dog-ear pages in most of the books I read.
I do -as one of my freelance works- the selection of quotes for this site: http://www.educared.org.ar/comunidades/tamtam/
You can see it here: http://www.educared.org.ar/comunidades/tamtam/?cat=90 but it’s in Spanish, and I’m thinking of doing a special site for them, so I can put in their original language, sometime, or quotes that are not meaningfull for young people (this site if for children and young people). I’ll keep you post it if I do it!