I gave a talk entitled PLEs and the Manchester PLE as part of the Personal Learning Environments & Personal Learning Networks: Online Symposium on Learning-centric Technology, organised by the The National Research Council of Canada PLE Project . This was in turn, part of the Connectivism and Connective Knowledge 2009 course.
You can see the recording of the Elluminate session, including an live demo of PLE features, or look at infinitely more dry slides below. The Elluminate session starts with a presentation by Rita Kop (well worth watching), and my presentation starts about half way through, after Rita's.
More recordings of other PLE/N presentations can be found here.