So in addition to my solid (if simple) main landing page for quotations, I found a few tertiary sites that should find a home somewhere.
Namely in this post.
So, in addition to The Quote Garden and Think Exist which I put on my main quotes page, here are some more great places for quotes:
No go forth! Be inspired and such! Or post an idea about how I can make a business out of sifting through these and finding the best quotes, because… I love to do that!