I have done plenty of beer trades through the mail, mostly from contacts made on beeradvocate.com and some of them have been international. Technically, the United States Postal Service will not ship beer, but most American beer traders just dont disclose the true contents of their shipment or find another shipper who will do the job. Becuase shipping small packages internationally can be a bit expensive though (particularly from IRL) I would suggest looking into some sort of bulk rate or something as a group. Or we could just all take a cheap flight somewhere and fill up our luggage with beer!