think tank forum

I just did a Google search for this and came up with a few results.

anobii

shelfari

librarything

and

goodreads

goodreads looks the most appealing to me for some reason, just based on the description of it on the site. has anyone used any of these? I vaguely remember something mentioning something like this.

aside: where should stuff about literature go? general discussion or art and poetry? I'm torn.