Hello, I've subscribed with my other address (caio.olive...@openbossa.org) to the callback-dev mailing list -- it is the preferred contact mail :-).
I think Cordova is a perfect use case for motivate the hybrid APIs in Qt. The multiprocess architecture change the game a little bit, so earlier support to expose QObjects in the webpage JS environment is not there yet -- and possible won't be there the way we are used to. There's a thread in webkit-qt mailing list that have a lot of information about what cases we are considering https://lists.webkit.org/pipermail/webkit-qt/2011-October/001953.html. Next week I'll take a deeper look at Cordova API and at exising Qt backend. Cheers, -- Caio Marcelo