Hi, Dave.
Thought you should have a look at this. It is a Launchpad MSP430 daughter board for implementing a complete reflow controller. It uses one of the GreenPak 3 chips you got recently as a quadrature to SPI bus converter (plus ambient temp sensor and variable-speed fan controller). The .GP3 file can be downloaded from my site,
http://www.bifrost-group.com. It also marks the first somewhat significant and useful project using Altium CircuitMaker instead of Eagle. The timing diagrams and other material on the converter is available in the documents section of the web site.
Cheers
J.R. Stoner