Treehouse Labs was one of a few companies inside the booth of a semiconductor company, because Treehouse is using that company's chips for its own products. Treehouse's main product on display was something called "BiKN" (pronounced "beacon"), which uses relatively tiny RFID tags and near-field communications to track various objects using almost any iOS device.
Because the iPhone doesn't have an RFID reader built in (yet -- we may eventually see most mobile devices include one), you'll need an extra iPhone case that slips ar