Google’s Area120 group just announced the launch of Keen: Want to share your passion with the world? Get Keen.
From the announcement:
On Keen, which is a web and Android app, you say what you want to spend more time on, and then curate content from the web and people you trust to help make that happen. You make a “keen,” which can be about any topic, whether it’s baking delicious bread at home, getting into birding or researching typography. Keen lets you curate the content you love, share your collection with others and find new content based on what you have saved.