Recently, I came across a unique service that allows you send greeting cards to customers, clients, friends, and referral sources, all from your computer. These are not e-Cards sent by email. They are actual high quality greeting cards that are printed, folded, stuffed, stamped and sent on your behalf, from a browser based Web interface.
The cards can even be personalized with your own text message, in your own handwriting, and with your own signature. One thing I like about the system is that you can schedule a series of cards to be sent out automatically, and even pre-schedule a card to go out on an anniversary or birthday.