Do you know any social bookmarking site that is specifically about ebooks?
How about a rating/discussion site specifically about ebooks?
Me neither.
Well... know there is one!
ebookmark.digitalreading.net is going beta.
It combines features of social bookmarking/ folksonomy sites such as del.icio.us with features of rating and review sites such as digg tailored for ebooks.
Please join the community where you can find like-minded people, share your opinion, and find best rated ebooks in the topic you like that you've never heard about.
Regards!
Tamas Simon (Sic.)