One of the aspects of doing the p2pu.org course on Designing Collabortive Workshops course was the ability to watch and take part in any of three presentations / seminars online.
I really want to thank the members of FLOSS manuals and the V4C (video for change) networks for stepping up and helping out with these transmissions.
Also thanks to Jane Park for co-organising the course.
The technology used here was google hangouts. If you know of an open source alternative please get in touch.