http://idealist.blinkr.net/
Idealist is a platform for designers and creators to publish and share their creativity, get feedback from the community and increase the popularity of their ideas.

In early 2007 I started Idealist because I believe on the free flow of ideas. I believe that there are tons of great ideas that are not being shared (due to fear of being copied, laziness, insecurity, or the lack of the channel). Idealist aims to be the channel to show and promote all those ideas.
Idealist is all about ideas, concepts, sketches, designs and new products.
Idealist displays user submitted and rated ideas.
Idealist wants to spread good ideas, because there are a lot of ideas that often get lost in dusty notebooks, and these are good ideas that are worth to share with other people.
Idealist has very good reviews from the media, it is used as a source of inspiration for many bloggers and it has an active and critic community.