Was just in the telephone shop inside Tescos in New Malden. They had a calling card on sale and there is an offer on for the World Cup. Looks like you can phone a country for free after each match so long as they win. I'm gutted Ireland aren't there but thought this might be of use to anyone with family/pals in South Africa / Spain / Italy etc. (assuming they win). My South African flatmate just bought one, I bet they won't even win a match. They don't sell it on the web but the guy behind the counter said it was in all stores. Just had a google for it and this came up:http://www.macworld.co.uk/blogs/index.cfm?blogid=14&entryid=3225488
(now that I have read this it looks like you get a free half hour call to the country which wins each match)
Guess this won't appeal to everyone on here, but seems a good offer.