Nevermind, I see the ICEfaces jars now. My eclipse view was hiding them ;)
If you ran seam-gen to generate your application, then there is a
freshentarget that will copy over the ICEfaces and dependent jars based on the icefaces.home property in build.properties.
Make sure you also update the commons-fileupload.jar as well as backport-util-concurrent.jar. You may want to check out versions-licenses.html in the /lib folder to ensure you have the proper versions of the dependent jars (I am assuming you upgraded form 1.6.1 though).
Thanks. Do I have to specify the theme somewhere, or copy over new css? It looks like the jars were upgraded, but the old styles are still in place.