Where I can find free birthday cards online that are actually funny? (That is, not the frogs sing shit like cheese)?

The the best site I found AmericanGreetings.com letters but make you sign for a "free" account that requires a map of credit – which loads after a month if not canceled. Any other site I found through Google Maps was lame. Do you know of any good free site?

Postcards brand msn both have a good selection of cards for every occasion

How to Make Pop-Up Cards & Envelopes : How to Make a Pop-Up Birthday Card: Part 1