I have a client who has a web site that requires membership. He wants to allow his users to find other users with whom they might have a existing friendship/relationship on a social networking site (Facebook, Twitter, etc).
Does anybody have any experience with this type of problem? If so, what to packages/APIs did you use? Right now I'm evaluating Janrain and Gigya, but we're still in the decision-making phase so I'm open to other solutions. This is mostly a JSP shop, but again, we're open.
Thanks in advance, Chip