There's not a public marketing site right now (I know, it's ridiculous - but we've been so busy installing Ellington and working with new clients, I've dropped the ball on getting it out the door).
Ellington is a CMS for online news sites, with support for news stories, all kinds of multimedia, an entertainment calendar, band/music database, and loads of other stuff. You can see it in action on most of the "Lawrence" sites on the Django-powered sites wiki page: http://code.djangoproject.com/wiki/DjangoPoweredSites - dig into lawrence.com for an idea of what the entertainment calendar can do. If you're interested in more information or pricing for Ellington licenses, feel free to email me directly and I'll send some more info your way. And I'll get back to work on that marketing site...