I have been working on a project and as I have just started on the webservice I found Lift has been released, so I am curious if there will be much more complication by using Lift over Jax-WS using JDK6.
I am doing this with the Eclipse IDE, but I don't know if I will get much benefit from the IDE on this project.
Lift is written in Scala, so the simple question is do you know Scala? If you don't know Scala but you do know JAX-WS, then Lift will clearly be way more work to get to a working implementation.
Scala and Lift are cool, but unless you are already comfortable with functional programming approaches, they will make your head hurt for at least 6 months. Since they are relatively new they also suffer from a lack of tooling.
You mention that you are using JAX-WS - can you do that with Lift? If you can't do it natively with Lift, can you easily integrate the standard Java libraries for this?
Depending on whether this is a personal project or work-related, your tolerance for taking technical risk can vary widely.