I've received very positive feedback and lots of good ideas on the concept of having a combined calendar of Free Webinars. The really nice thing about the way Jon Udell has set up his elmcity project (the system we are using) is that it acts a lot like social curation on RSS sources as provided by Browse My Stuff, but brings together designated calendars instead of blogs or other RSS sources.
In English, that means that we can have many different people each own their separate calendar and we can bring it together.
The initial list of calendar entries, we added ourselves. But I'm pleased to announce that we've just signed up our second calendar curator - Coaching Ourselves. Their events are now appearing in the listings: