You might want to check out lift-json again. It can easily serialize and deserialize case classes. https://github.com/lift/lift/tree/master/framework/lift-base...

Also, Play 2.0 includes Jerkson, so whatever Jerkson can do, Play 2.0 can do. They just happened to add some helper utilities that made it very similar to lift-json. So I think the community is settling on something good and simple.