Ross Mayfield has started a Flickr photostream where people can contribute photos of Silicon Valley company parking lots during the weekend. Why? As Mayfield explains:

My uncle was a guru on wall street when I asked him where I should invest my paper route money. He said to visit the parking lots of Silicon Valley companies during the weekend. If the parking lot was full, there was a good chance they were close to a breakthrough or release.

Now that’s a lot of biking around to base a portfolio strategy.

But with enough mobloggers, a panopticon of performance may be a great leading indicator.