* CoolReading.
Book reviews, 2004-present. Most are cross-posted to Amazon
(Top 500 reviewer) and LibraryThing
and a few to Internet
Archive.
* MetaFilter. Ranked
among top 10 posters, which really, can't be good.
* Wikipedia.
Started around June 2004 and by May 2007 was ranked #350 by number of
edits and then burned out, not as active since.
* Author Watchlist. This
simple Unix script is an author watchlist. It will email you whenever a
new book comes out by an author(s) on your watchlist. Keep track of your
favorite/obscure authors without relying on the luck of popular media or
trips to the book store to discover when new books come out. It uses
LibraryThing for a database, but you don't need an account there.