A wireless communications system comprising: a wireless communications network; at least one Near Field Communications "NFC" tag associated with a device; and a plurality of wireless communications devices, (21, 36) each configured to communicate via said wireless communications network, at least one of said plurality of wireless communications devices comprising: a portable housing, a wireless transceiver carried by said portable housing, a Near Field Communications "NFC" device carried by said portable housing, a Bluetooth wireless-based availability detector carried by said portable housing, and a processor carried by said portable housing and configured to: determine a first availability status based upon said NFC device at a first time, wherein the first availability status is based upon a momentary proximity between a NFC tag associated with a device and said NFC device carried by said portable housing, activate said Bluetooth wireless-based availability detector based upon said NFC device, determine a second availability status based upon said Bluetooth wireless-based availability detector, said second availability status being based upon a Bluetooth wireless communication between the wireless-based, availability detector and the device at a second time after the first time, and communicate the first availability status and the second availability status to said wireless communications network via said wireless transceiver. a wireless communications network; at least one Near Field Communications "NFC" tag associated with a device; and a plurality of wireless communications devices, (21, 36) each configured to communicate via said wireless communications network, at least one of said plurality of wireless communications devices comprising: a portable housing, a wireless transceiver carried by said portable housing, a Near Field Communications "NFC" device carried by said portable housing, a Bluetooth wireless-based availability detector carried by said portable housing, and a processor carried by said portable housing and configured to: determine a first availability status based upon said NFC device at a first time, wherein the first availability status is based upon a momentary proximity between a NFC tag associated with a device and said NFC device carried by said portable housing, activate said Bluetooth wireless-based availability detector based upon said NFC device, determine a second availability status based upon said Bluetooth wireless-based availability detector, said second availability status being based upon a Bluetooth wireless communication between the wireless-based, availability detector and the device at a second time after the first time, and communicate the first availability status and the second availability status to said wireless communications network via said wireless transceiver. a portable housing, a wireless transceiver carried by said portable housing, a Near Field Communications "NFC" device carried by said portable housing, a Bluetooth wireless-based availability detector carried by said portable housing, and a processor carried by said portable housing and configured to: determine a first availability status based upon said NFC device at a first time, wherein the first availability status is based upon a momentary proximity between a NFC tag associated with a device and said NFC device carried by said portable housing, activate said Bluetooth wireless-based availability detector based upon said NFC device, determine a second availability status based upon said Bluetooth wireless-based availability detector, said second availability status being based upon a Bluetooth wireless communication between the wireless-based, availability detector and the device at a second time after the first time, and communicate the first availability status and the second availability status to said wireless communications network via said wireless transceiver. determine a first availability status based upon said NFC device at a first time, wherein the first availability status is based upon a momentary proximity between a NFC tag associated with a device and said NFC device carried by said portable housing, activate said Bluetooth wireless-based availability detector based upon said NFC device, determine a second availability status based upon said Bluetooth wireless-based availability detector, said second availability status being based upon a Bluetooth wireless communication between the wireless-based, availability detector and the device at a second time after the first time, and communicate the first availability status and the second availability status to said wireless communications network via said wireless transceiver.