I recently heard from a writer named Ben Feldman, who likes found objects and the stories behind them as much as I do. He chronicles some of these stories on his blog, New York Wanderer.
Typical of Ben's work is his investigation into the tale behind the promotional change purse shown above, which he found at a flea market. He's a better and much more dogged historical researcher than I am, so he was able to extrapolate a several decades' worth of family history, including tales of illicit liquor sales during Prohibition, from this one item. The resulting blog is lengthy but fascinating — check it out here (and you may also want to see the New York Times piece that emerged from Ben's work).
Ben has done similar investigations into a memorial plaque for the former head of a hatters' union (there's a follow-up to that entry here), a small daily memorandum book, and a tinted glass slide. Good stuff from a kindred spirit.