JanRain has some interesting case studies on OpenID deployment on its website. Of course, you shouldn’t expect unbiased commentary about OpenID there but those statements are interesting nevertheless. Companies mentioned are Mixx, Get Satisfaction, SourceForge, 37 Signals, and more.
An interesting quote from the Property Maps study:
We deployed OpenID in January of this year and saw registrations increase by 200%. Currently about 25% of our registrations occur via OpenID. As more major OpenID providers like MySpace come online, and as consumers become more familiar with OpenID, we expect to see these numbers increase as well. An example of this is when Yahoo’s implementation came online in February, we saw a surge of user registrations.
Tags: Case Studies, JanRain, Major, OpenID, Yahoo