The Possio PX30 uses Linux and Java to bind together 802.11b and Bluetooth; cellular data optional: This review details the features of the PX30, which has built-in 802.11b and Bluetooth and can also take a module for GPRS and 3G flavors of cellular data. The device also has an Ethernet and USB interface. The PX30 can route data among devices or networks connected via any port. It even supports OSGi, a standard for networked devices that need to communicate with one another.