Thanks to Jordan for suggesting the site upcoming.org.
Basically, it’s an online events database that you can subscribe to via iCal etc, or view online. See what’s going on in your city, or somewhere you’re going. See who else is going. Invite people to stuff. Add code to your blog.
It also has a groups facility, and to this end I’ve added an alt.emergingchurch UK group which you can subscribe to. So if you have an event you are organizing, sign up, put it up and people can know about it. Just added the National Gathering.
Spread the word.