My piano is painted, varnished, and ready to play! It is in Paternoster Square, just behind St Paul's Cathedral. It is a lovely thing to hear people play in the city. It is also a rare opportunity for strangers to talk and smile together. I recommend hanging round the pianos for a day of meeting people, hearing stories and enjoying London.
There are 20 decorated pianos around on the streets for three weeks, as part of the City of London Festival. See all the pianos on a map, photos and videos of each here - http://www.streetpianos.com/london2011/
PS. The man in the top photo played Leona Lewis, bet you didn't expect that.