Here's where* my paying customers have come from in the past 6 months:
Direct: 69%
Google: 17%
Blog/press mentions: 6%
Pinterest .52%
I recall a blogger recently who reasoned that women are using Pinterest as a substitute for making real purchases. And that the act of pinning things feels similar to hitting the buy now button.
That feels about right to me.
*I know it doesn't add up to 100 - paypal is taking credit as a source of traffic for some reason.