Dear Dale,
Looks very slick .
What version of Moodle is it for? Would you consider hosting on GitHub even at this stage as two separate repositories like 'theme_xxxx' and 'format_xxxx', then others could install both, test, make improvements and do pull requests to help? It does not matter if its in a development 'Alpha' or 'Beta' stage as a caveat not to install in development environment works .
Cheers,
Gareth