If you have an opportunity you want people to know about, let Squarepeg know about it first. We'll send it across the web to wherever you have supporters (Facebook, Myspace and other social networks, blogs, websites, email). If your supporters act on that opportunity, their friends will be notified via the communication channels your supporter chose (e.g. if your supporter uses Facebook, their friends are notified via the mini-feed). If you are looking for opportunities, you get to choose the tool (Facebook, Myspace and other social networks, blogs, websites, email) you use to receive updates from Squarepeg. You can choose to follow updates from any specific organization (like, Amnesty International), or individual (like, me!). Based on the interests you express when you follow people and take action, we'll also recommend opportunities in your area that you are most likely to be interested in. The recommender system is a great way for organizations to reach new individuals, without bothering those that are unlikely to be interested.  Whether you are an organizer or a would be volunteer, you will also be able to browse through groups of people and organizations that have common interests, similar to how you can browse groups of similar books on Amazon.com. We hope this will foster collaboration by helping people and groups understand their common causes, likely partners, and opportunities for collective action.