Hi,
I agree with you guys 100%. Supposing you're definitely going to attend, all you have to edit is http://wikimania2010.wikimedia.org/wiki/Template:Attendees/100 Am I alright?
Just click on "Attendees" on the sidebar, then the link "Definitly" and fill out the form. If you are already on the list, you can edit [[Template:Attendees/100]] to change any existing information.
Regards,
Church of emacs