Hello all!
About Vesa's question on slideshare, I would like to suggest you to "google" - Anymeeting. It's a free virtual room tool, that allows drawing, word docs, excel and ppt, audio and camera, changing presenter role to any participant and more. I used it some time ago for a small meeting (5 people) and it worked fine. The weakness is... you can't record the session on the free version. Ah... and...of course it comes with the usual registration need, but...
:-) I hope it helps!