Googling this topic gives me this:
http://blogs.adobe.com/captivate/2010/08/reporting-the-quiz-results-to-a-local-server.html
Which
a) doesn't work at all (SWF just doesn't post to the page - no error message or other hints), and...
b) Relies on the user clicking "post result" after the test, and...
c) Pops up a little window asking them who they are (enabling very easy cheating - their friends can just hit the button again and enter their own details to "pass").
Other google results include:
Solutions for old versions of Captivate that don't work with the current one (5.x)
Solutions that don't write to a database/xml/variable (and can't easily be made to, e.g.: it sends an email for every result set)
Solutions that seem significantly more complex than just writing my own simple Captivate-like app from scratch (which all seem to have one of the aforementioned problems too).
Has anyone found or worked out how to do this? I just need to get the results out into a format my app can read - javascript variable, DOM object, xml fragment, database, querystring parameter, anything.