According to online measurement body UKOM, Facebook attracted more visitors in the UK than Microsoft.
(Yes Facebook had 26.8 million visitors in Britain in May 2011, beating the 26.2 million who visited Microsoft’s MSN, Windows and Bing sites combined. Google is still top of the pile with 33.9 million visitors, whilst Twitter’s UK audience was just 6.1 million. I dread to think how much heat their servers produce coping with all those visitors.)