Jan,
Thanks for highlighting the User Groups Portal! We are working to get the word out to user group members around the world and this is a great first step. I am working behind the scenes to do this and I kindly request that everyone does the same.
A note to user group presenters - I encourage you to post your session material on the Wiki! You'll reach a broad audience and certainly help others who were not able to attend your session in person.
Cheers,
Craig