Interbrew UK is launching the first advertising campaign for its Australian beer brand, Castlemaine XXXX, since it took over the brand earlier this year, in an effort to re-establish it as a mainstream lager. The multi-media campaign features two Australian characters who travel the world to seek out Castlemaine XXXX in the most unusual places. "The underlying message is that  Aussies go everywhere and always have a good time - with Castlemaine XXXX playing a major part in that," said Interbrew.