Yes, found the XML export information. The key part of that description being 'export virtually all', which carefully dances around the fact that it doesn't export 'all'. I find Easy Grade Pro has a good number of configurable export options, all of which seem to leave one thing or another out (that or I'm just getting paranoid about the application).
I'm hoping to bypass the EGP export all together and parse the raw .egp file directly (and yes it includes all manner of binary data). Wouldn't bother messing with it, if there wasn't a need :)