Here's the most recent one stating the economic gains of a bike commuting population over car driving population:
One mile on a bike is a $.42 economic gain to society, one mile driving is a $.20 loss
And here are some recent ones that are making a similar case.
Secret To A Long, Healthy Life: Bike To The Store
How cycling set deprived Indian girls on a life-long journey
And one for semi-comedy about bike lanes:
Please feel free to share any hippie propaganda you want here that proves that riding bikes is truly good, I know other members and I would love to read up!