Did anybody hear the piece on the BBC radio news about Olympic sponsorship and advertising - the Ricoh Arena are having to cover up all the Ricoh signs, any advertising around the pitch and stands, and even the manufacturer's logos in the wash basins and toilets. They cannot even announce 'Welcome to the Ricoh Arena' over the PA. This apparently extends to an 'exclusion zone' around each venue, to the extent that Network Rail are trying to find a way to avoid having to mask the word 'BRAINS' on the Brains Bridge near Cardiff railway station, as it's within the 'zone' for the Millennium Stadium.
Edit, link to Beeb : http://www.bbc.co.uk/news/uk-18171672