I never looked into Lift, so I can't answer your question directly. Play!, I believe, has to offer a smoother learning curve. You can mix Scala and Java code (e

I never looked into Lift, so I can't answer your question directly. Play!, I believe, has to offer a smoother learning curve. You can mix Scala and Java code (eg. controllers in Java, service layer code in Scala) and migrate fully to Scala when confident enough. Frankly, as much as I like Actor concurrency, I don't think you'll use it a lot if a web application.