What are they?
They are short talks, or lights, of 5 minutes long. There are not questions during the presentation, but if you think the subject was interesting enough for you, there is nothing that stop you to "bomb" with questions to the author later or during the week
The proposal is currently open and finishes on July 11, 2010 00:00 UTC. Have you got an interesting idea and want to present it? If so, please have a look to the following link: http://www.guadec.org/index.php/guadec/index/announcement/view/8
They will be available during or later the conference.