A fake Japanese programmer, Yutaka, is the main character of a viral campaign by Crispin Porter + Bogusky for Virgin Atlantic. London is showcased through a snazzily designed web site, YutakaLovesLondon with tips on places to go. Click on the plane in the sky and you'll end up at Virgin's site.
An additional site supposedly created by Yutaka, YutakaProjects gives you the power to change the time on Big Ben, raise and lower Tower Bridge and even put a message up at Piccadilly Circus. (hat tip Adverblog)