This is a simple USB and Bluetooth protocol stack. It implements a full-speed (12 Mb/s) USB host by bit-banging, so it requires no external hardware to interface USB devices to a Propeller.
Version 1.0 includes support for FTDI Serial, Mass Storage, and Bluetooth devices.
The Bluetooth support lets you use a cheap USB Bluetooth adapter to add wireless communications to your Propeller. Supports the Serial Port Protocol.
Advanced users can also write their own drivers for new USB or Bluetooth devices using lower-level APIs.