i've experienced the same problem.
Do you have any idea?
At least in 4.0.1 the class is in following jar-file
I got the same warnings after removed ws4ee since my app didn't use it. There should be no problem to remove the interceptor from the config file.
I too starting receiving this ServiceEndPoint error after removing jboss-ws4ee.sar... but I HAD to remove this sar BECAUSE I was getting NoSuchMethodErrors regarding Axis (my enterprise application uses Axis, and JBoss has Axis as well, which was causing a conflict).
In regards to this ServiceEndPoint, have you folks here in this thread reached a consesu as to whether is is detrimental to remove it from the standardjboss.xml ?