Not sure if it was meant to be this way.. but the design looks eerily similar to facebook's.
purely coincidental
Are you sure? It seems to be as if you just took their source code - you even have their logo in the top right corner.
the padlock logo is recommended by facebook, it's in the wiki
What isn't recommended is the implication that the site is somehow sponsored by facebook, which I think they will feel this site tries to do. Intentional or not.