The Microchip PICkit2 is a programmer/debugger for PIC microcontrollers, but it can also be used as a 3-channel logic analyzer.
See Microchip PICkit2/Info for more details (such as lsusb -vvv output) about the device.
- Microchip PIC18F2550-I/SO
See also this flickr set for more PCB photos of the device.
- The pk2-la project has basic protocol docs and a Python implementation.