I've just got an e.mail from vistaprint with the latest free offers if anyones interested.
Christmas postcards
\linkwww.vistaprint.co.uk/vp/ns/splash/freebc.aspx?xnav=h\Business cards}
\link\Address Labels}
There are other free offers too. You have to pay for postage and are limited to quantity. You can upload your own artwork for some stuff.
I have used them for business cards twice, return address labels and charactor labels for our Christmas cards.