I have had that happen in the past as well and I sent the seller basically informing her that paypal clears straight away, as in the money has left my account therefore the item is technically "paid for" even though it has yet to clear her account and I expected the item to be posted as promptly as I had paid .......... she waited until payment cleared and took her time posting it out so I left neg feedback
hope she does the right thing and sends your stuff quickly.