The current issue of Servo magazine has an interesting item on using the Stamp Logic Analyzer (from www.parallax.com) with non-Stamp microcomputers. It should be possible to monitor 16 lines and decode serial, I2C and SPI signals. The cost has been kept down to $79 by leaving out input buffers and test probe leads. Some kind of adaptor would therefore be required between the Stamp compatible header board and the PICAXE chip. Has anyone tried this approach to producing a low cost logic analyzer?