I spoke to people from Moo recently at the Focus Imaging fair - they said they're currently trying to talk to DA so that they can go through DA with the cards like they already do with Flikr.
They're also updating their system so that the minicards have as much flexibility over the rear design as the regular sized cards.
How did you get your avatar on there? They don't offer that when you order through the site atm?
Obviously the purpose is business cards if you look at the site. This would be great to set next to photos in a coffee shop or hand out, basically to get people interested enough to go online to your photo site. I would even use these for non-photo related business cards. That is, if you can justify the cost of 50 cents per card.
They're also updating their system so that the minicards have as much flexibility over the rear design as the regular sized cards.
How did you get your avatar on there? They don't offer that when you order through the site atm?