You have to move quickly though as they are only giving away 10,000 free 10 packs, and when they did it last time with Flickr, they ran out pretty quickly.
You can customize the front and back of the card, with the front having one of five colors and various text, emoticons and whatnot. It is pretty slick, and sure to be noticed by those you hand them out to. On the back, you can put in your custom Skype information. Have a Skype-In number? Put it there, and pass it out at parties or whatever.
The best part is that if you can get in on the 10 card freebie deal, its, well…FREE!