I'm the first to admit that getting a bunch of Holiday cards in the mail is fun...but for us we've done eCards two years in a row. Not that cards are super expensive - but we just find the waste of paper to be a little much sometimes. And, the best part about Ecards is that they are free! We're also able to send the card to many more people this way (our email list of close friends and family is 107...that's more than most people can afford to send paper cards to).
I love Pingg for their lovely range of templates and customization capabilities.
Here's the card we sent this year...with Ollie by our tree wearing his festive little doggie sweater. Really, he likes being dressed up I swear!