I wouldn't presume to volunteer myself as a speaker (and I think I might
have signed up for a study course that weekend) but thanks for making the
offer.
If no one volunteers (on list or more likely privately off list) and if
you haven't already you would do well to contact OpenUsability.org (who
work closely with KDE).
http://www.constantvzw.com, a small cultural organisation working at the
The site doesn't appear to be working at the moment (I used a search
engine to confirm I had the right address).
Was able to learn more about your publishing from a slightly
different address
http://ospublish.constantvzw.org/