I'm working on the VM integration via CB Action Queries; First thing I note is that if you want to send user data from CB to VM , the country field needs to be an id not a 2_code or 3_code text. I used the VM table virtuemart_countries as the source for the cb_select_country field query, since it has the correct id field.
Same goes for the state - VM needs an state_id. I gave up with this, since the VM states table has 'England','Scotland' etc as its UK 'states'; I just added a new simple text field to the VM_Userinfos table and will copy the CB 'state' field into it. Still testing how this displays, though, and, of course, it will need re-doing if VM is upgraded...
