* An additional 2,000 bikes and more than 150 new docking stations
around Clapham Junction, Hammersmith and Putney.
* An increase to the area covered of more than 50%. The scheme now
covers over 100 sq km of central and inner London

http://beta.tfl.gov.uk/travel-information/improvements-and-projects/barclays-cycle-hire-expansion

Map (PDF):
http://beta.tfl.gov.uk/static/2125100169/cms/documents/bch-south-west-expansion-boundaries.pdf

The blurb says London has the second largest such scheme in Europe -
presumably Paris being in pole position.

Just had a horrible thought... Fockstons, er sorry, Foxtons becoming the
new sponsor of the scheme... shiver!