Here is an interesting article on how social networking might influence creativity.
And while reading this I came across a creativity-oriented social network called Shapeshifters - has anyone heard of it? It seems a great resource for the Global Block. It particularly aims at connecting people across the globe that have similar dreams, ideas or problems. It seems to me like a mega-blog, but which connects through themes, and not only through individuals. Just browsing through it (you can brows by topic, and tags that relate to themes and also places that are related to your post), you can get an idea of how this can be a great source for global design thinking! Their aim is to: