This thread has given me quite a number of new bookmarks, bringing my e-book bookmark count to 15! (Feel free to add mine to yours.
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It's good to see that there are actually so many sites offering e-books in various formats. It's like an ever-increasing boulder, poised at the edge of a cliff, waiting for an event (such as a popularly successful e-book reader, e-only author, or iTunes-like service) to send it over the edge and into the mainstream.