This module is no longer produced. The Enhanced version (see below) is available.
The USB-I2C module is a low cost USB to I2C module, with a simple command set, and interfacing to any I2C device. The USB-I2C module provides a complete interface between your PC and the I2C bus. The module is self powered from the USB cable and can supply up to 70mA at 5v for external circuitry from a standard 100mA USB port.
Technical documentation can be found on the website of Devantech.