In reply to Grégoire Noyelle.

It shouldn't be about whether it's a WordPress Solution or not, but about whats a better solution for the task at hand. That said, yes this does look like a better tool for speaker wetting and selection.

It's a little too late in the day for us try it out for WordCamp Mumbai, Our Speaker call would be closing in a few days... But I've recommended other WordCamps here try it out this year.

I think to have it in the WordCamp site itself, one just needs to ask, there are many tools and features that have been added over time.