Definitely the top cast members to appreciate are your maid and concierge, even if you don't give these cards to everyone you see as I did.
We printed ours from Tagrel.com, where there is an amazing selection, and I did some scrapgirl ninja action on them...glue sticked those babies to card stock in an array of colors and signed the backs of them, "Peace and Love, Arthur and Kristi, Tulsa, December 2009." With last year's experience, this year I am going to type our info on them and laminate the whole card (December in Florida = wet fanny pack = soggy card casualties). The laminated card could become a bookmark for sentimental hoarders like myself who keep everything anyone ever gives them if they can in any way rationalize it.
Now it's your turn:
Tagrel's extensive collection of CMACs (colorful images of Disney characters...includes Halloween and Xmas cards)
CMACs of the more plain Jane variety
Some nice cards for maid or concierge for purchase via zazzle
Have fun! Please let me know if there are any more CMACs online I should link to! Cheers!