Ok, last Facebook post, I promise, but for Londoners, there's Poke 1.0, a 'Facebook social research symposium':

This social research symposium will allow academics who are researching the 'Facebook' social networking site to meet and exchange ideas. Researchers are welcome from the fields of sociology, media, communication & cultural studies, information science, education, politics, psychology, geography and any other sphere of 'internet research'. PhD and post-doctoral researchers are especially welcome, as are researchers considering Facebook as a potential area of research.