Well, I have these card designers under "inspiration", but I just wanted to give a special shout out to Zeichen Press, and to Fran Shea's blog.
I stumbled, well, ran my cart into their cards at Trader Joe's, and now am hooked. Not only are the cards handmade from a vintage letterpress and have a rockin' vintage look - but they are HE-larious. I went so far as to confess to the designer Fran via e-mail that I am now her official stalker. Being the sweet and understanding woman that she is, she doesn't seem to be bothered by my living in the bushes outside her house or my digging through her trash.
What it comes down to is -
Need a card that doesn't suck? Buy Zeichen.
Need to laugh? Go see Fran.