not sure if it will be of interest but I have started working on a Spring-Social implementation for the GeekList API - It has basic functionality including the OAuth process and then getting user details (authenticated and not) and Cards for users.
GeekList is still in Beta, so the implementaiton still uses the sandbox API (but you can request full access if you want to actually use it). If you havent checked out the site, i recommend it (im not affiliated with the site, but its a cool site).
The code is available here if anyone wants to have a look/play with it: https://github.com/robhinds/spring-social-geeklist
Forgot to mention - geeklist is http://geekli.st and to sign up to use the api sign up at http://sandbox.geekli.st/