Looks like its a Major issue over at Samsungs end...
http://forums.cnet.com/7723-13973_102-637012-1/samsung-smart-tv-unable-to-connect-to-internet-suddenly/?tag=contentMain;posts
http://community.virginmedia.com/t5/TV/SAMSUNG-Smart-TV-router-connection-OK-but-internet-not/td-p/2768241