If you register on the Carlsberg website, they'll send you out vouchers for free pints and a free ball. Prefer Becks myself, but free drink is free drink. as anyone who has signed up to the Guinness equivalent offer will know. Just thought I'd let people know. :p
http://www.liveit.ie/
(Guinness do the same (or at least did the same during Six Nations matches), sending out poker kits, fortnightly vouchers, hats, t-shirts and glasses to anyon who registers with them.)