Macmillan have now made the webinar available to download for people to view on their iPod/iPhone. They can also watch an edited version that streams right on the webpage.
The direct link for this is here: http://www.macmillanenglish.com/Course.aspx?id=43864.
You can also get to this now from the webinar page at www.macmillanenglish.com/season.
Thanks to Matt Kaye and the team.