DeepMemo is another social networking site for quotes. There are a number of uses for DeepMemo, whether it be collating quotes for private use or sharing quotes with others.
There is a toolbar that can be installed in your browser, which will allow you to highlight text and then press a button for the quotation to be saved and shared.
Google Books have often had a lot of bad press. The bad press has been largely over issues relating to copyright and similar issues. However, as a concept I find the Google Books project to be a tremendous idea, especially making available so many books that are no longer in publication. I have found Google Books to be a tremendously important resource.
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