Games Convention Online is interested in having speakers give lectures on Business & Legal (e.g. business models; micropayments; start-up & Investment topics; data security), Development (e.g. game design; programming & production; open source), Browser Games, Client-based Games, Mobile Games, Social Games (e.g. connection to browser games) and Internationalization (e.g. localization, international networks, community management).
GCO takes place July 8-11, 2010 in Leipzig, Germany. You can submit a speaker proposal here.