I would like just to introduce my small .NET-C#-Biztalk community site, which (of course) runs on Drupal.
I would like to know what do you think about it.
NowPublic.com is a Drupal powered site focused on changing the way the news becomes news. Imagine that you are walking down the streets of Manhattan when a trailer drives by with the group U2 jamming away. You use your camera phone to snap a wicked shot of Bono - but where do you send it? To your blog? To your friends? To a bulletin board? But how is anyone who doesn't know you going to find it? Instead, you could email it to news@nowpublic.com and let the world know that there's something cool going on. NowPublic lets you share your good stuff with not only your friends but with the world, while at the same time protecting your rights and giving you full credit. Here's an example of what I mean:
I am not sure if Greenpeace is using Drupal or Civicspace (there are no hints except terms like node, taxonomy and the graphic for a menu), but they have done some amazing work with the design. They have also integrated some of Actionworks' stuff, but all in all, a great campaign web site: