Just found a strange site: it's called "American Photo Library", but it's a Japanese site; it's got the most beautiful frame enlargements I've ever seen: very clear, yet lush; take this one, for example, from Evil:
or have you ever seen this from Shanghai?
or how about this, from Ambersons?
Anyways, here's the URL:
it's only a preview, so it's only 2.5 pages, but still, interesting stuff (for free)