http://about.ookaboo.com/a/about/facebook_connect
Ookaboo's semantic technology, remarkably, has allowed us to amass nearly a million well-organized images with a minimum of human involvement. Ookaboo has a critical mass of content, and is beginning to attract a significant audience. We're on the threshold of developing community features that will realize Web 3.0.
Ookaboo is the latest in a series of sites developed by Ontology2 and we've always had a product line strategy that would require federated login. For a long time we've considered OpenId, Facebook Connect, and developing our own in-house system. In that time, Facebook's offerings have become increasing attractive.
Many people have strong feelings, positive and negative, about Facebook, so I'd like to explain a bit about our reasoning:
In a decade of developing web community systems, I've found that a large amount of effort goes into the management of problem behaviors. Because Facebook users feel invested in their online identities, many sites have discovered that Facebook authentication attracts a nicer crowd. This frees up our resources to work on the unique things we provide.