-----You can see from the diagram in the picture, you plug the PICAXE microcontroller into the ZIF socket one way to program PICAXE-08/14 family devices. To program the PICAXE-18 family place the notch and pin 1 to the opposite side of the ZIF socket. The rig tests fine with all the PICAXE families mentioned.
-----I did solder female header rails adjacent to both sides of the ZIF to allow easy hook up of a servo, LED, etc. However the point of the design was to create an small, tight, easy way to download code into a PICAXE and not create a development board.
The cost was close to "free" since I already had a ZIF socket. Labeled schematic follows (click to enlarge):