Yes, this is what address is for. See here: http://html5doctor.com/the-address-element/
Not 100% if it qualifies as a vcard, but as the class name isn't the same as microdata, I don't care!
Don't know about the 2 people thing, but don't care about the vcard. More interested if an address can represent 2, or if we should wrap each of us in seperate address. Decided against it as it would be creating more markup than is needed.