Hi Oliver :
Did you ever receive any information on this? I'm interested in doing the same with FUSE ESB 4.0.
I don't have any experience with this combination, but I don't really expect any problems with it either. The Spring-* bits are usually good to go with OSGi. You should be able to just deploy the jars as bundles and get started. Feel free to ping us if you're experiencing any difficulties with this...
The main benefit of considering CXF as well is that we integrated that with Camel more closely. For Spring-WS, you probably have to add some glue code yourself while this work has already been done for you with the CXF-Camel combo. The overlap between both projects is not that high actually, CXF is really geared towards the web services while Camel is more about what happens with the Message in between.
I know this thread is over 1.5 years old but I want to let you all know that Spring-WS support will be available in Camel 2.6. So you can use this in ServiceMix if you like (since Camel is shipped with ServiceMix).
The documentation is already available: http://camel.apache.org/spring-web-services.html. The code will be integrated soon.