I tried using that page, but they were resisting about automated bots by giving "Forbidden Request" reponses. I'll try to find a better source though.
Scraping 101: Set you user-agent to mimic a browser, for example: curl -A "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.186 Safari/535.1" http://www.london2012.com/medals/medal-count/