What to do with Chicago's water tanks...

According to the Trib, the Chicago Architectural Club recently announced winners of a contest seeking ideas for what to do with the city's rooftop water tanks. There are some very cool ideas, my favorite is the winning idea from Rahman Polk (PDF), which uses the tanks to harness wind power and support a city-wide Wi-fi network (an idea that's got some people talking already). Let's hope the best ideas prevail.