Following up on my post about testing Facebook valuation with data about Facebook messaging, I propose another test: Facebook check-ins (aka Facebook Places). Again, can an otherwise not-so-useful app take off when overlaid with the Facebook social graph? From my use and the use of friends as far as I can tell, I don’t see that this is happening. I doubt my sample is very representative, so I would like to see the data. This recent piece on ReadWriteWeb takes a negative view of the check-in in general, and in particular, interprets (admittedly limited and old) data to brand Facebook’s efforts as a failure. It would be useful to see more comprehensive and recent data on Facebook Places.