Here are the 3 most amazing quines I found lately.
third order quine . And here's a SO post discussing a bit about it
ruby rotating earth quine
The new kid on the block. Judge yourself.
For those who didn't bother to google or wikisearch, here's a quine guide
And here, a lisp quine that shows the greatness of simplicity.
((lambda (x) (list x (list 'quote x)))
'(lambda (x) (list x (list 'quote x))))
PS: This post is under 'mis cosas' (personal) tag, because there's much more than programming involved in the mind process to understand these things. So yes, quines are a cool concept even IRL.