Niner since 2009
Will be uploaded today.
@Ian2: I've changed the abstract, as we have indeed released Silverlight 5 earlier this week.
The full video is now online. You can watch it here.
The slides are available here:
https://www.microsoft.com/belux/techdays/2010/videos.aspx and then enter 'Anders Hejlsberg' in the speaker search box. PPT's and videos of the other TechDays sessions are available too over there!