OpenStreetMap is a project aimed squarely at providing free geographic data such as street maps to anyone who wants them. This is because most maps you might think of as free actually have legal or technical restrictions on their use, holding back people from all walks of life who would like to use a map for one reason or another.
OpenStreetMap has put together all the GPS data it has in London and made a stunning poster from it. It’s a limited edition A0 (841mm x 1189mm) high quality black and white print, signed and numbered by Tom Carden and Steve Coast. Available to you for 10 GBP plus postage and poster tube (contact steve-at-asklater-com, pickup available from dorkbot London or other events).
(Mixing from the front page and merchandise page of the very cool Openstreetmap project.) Steve Coast is willing to ship to the US, with fees and conversions, its £18.69, or $32.68 ($38.60 with a signature requirement. Via Steve’s Blog, but apparently this has shown up elsewhere. I’m glad I got my order in fast.