On the 7th of November my company, Fry-IT is hosting the London arm of the World Plone Day in our office. It's basically an event for Plone developers, Plone companies and other people interested in Plone to meet up and promote or learn or share something about Plone. To quote the "FAQ":
"What is the goal of the World Plone Day?
The World Plone Day (WPD) is a worldwide event. Our goal is to promote and educate the worldwide public about of the benefits of using Plone in education, government, ngos, and in business."
The "invite" is here. I'm really looking forward to meeting everybody and put faces to people whose blogs and mailing lists posts I read. My colleague Lukasz has a nice map to our office and I recommend that you contact him to say you're coming.