Here's one for the tower-block dwellers - a wind turbine you stick to your window.
On the inside, you stick the matching base-station, and the set uses electromagnetic induction to transfer energy from the spinning turbine to the phone in the charger's cradle.
It's a neat idea, but I don't know if it's a real product - I tried tracing the links back, and ended up going round in circles in the blogosphere.
What I am sure of, though, is that somebody reading this has got the skills and motivation to build their own version. You don't need to use the same design of turbine blades, and it's up to you how it sticks to the window (suckers? magnets through the glass?), but I bet you can do it.
Just remember to post an Instructable.
Traced back to Yanko Design. Originally seen on NOTCOT.