Check out my Free BtVS E-Cards
That link actually takes you to a page at my website that has the link to the e-cards, powered by Bravenet.
Some of you will recognize the 5 birthday cards that are available, since they're what I've been sending out as attachments/photo mail for the past year or so. As I make more cards I'll make those available too. Or, if you've made some graphics that you've sent out as cards (other holidays/occassions accepted too) that you'd like to make available, I'd love to do so. I can have up to 20 images, I believe.
For those of you who I originally made these 'cards' for, I hope you don't mind me making them public. If you do, let me know and I'll remove them from the selection.