See PICAXE Basics for simple tutorial and I/O examples.
DHD20120129: I have put together a simple Ant build.xml to help assemble final 'sproduction' (source) code from a base stub plus modules, given the lack of support for #include or similar in the PICAXE basic. I very much want to avoid cut-n-paste code problems.
DHD20130129: the first module is some basic SPI support, to be used first with the DS1306 RTC, then with the RFM22B radio. I'll also be generating some basic hardware schematics to save rework: saved in editable and widely-viewable (eg PDF) formats.