It's always a plus when my analyst side gets to jive with the bicyclist in me. Recently released is OpenDataPhilly.org, which seems to be a trove of various Census and other data made available free to the public. Biking data are in the mix!
Another assemblage of biking data, over at The Atlantic, is of various parking arrangements for bicycles, including ways to launch your bike up a utility pole to keep it from would be thieves (although not squirrels). Those data are not the quantitative kind, but illustrative of creativity and sharp design.