Does anyone know how RightMove achieved this:
http://www.rightmove.co.uk/tube-map/

I'm developing a website called myTubeStop.com , which in essence is exactly that.. But slightly, better.. BTW, I emailed RightMove several months with my idea and asked about partnership, but they didn't get back to me and 4 months later, they produced an idea similiar to mine... go figure!!!

Anyway, anyone know how they achieved that overall map ?