Hey Glen,
I got it! I got it!
In an other thread here "Class loading issues with Jersey 1.11 or 1.8 
and Spring 3.05 or 3.1.0 (SpringServlet and javax/ws/rs/Path, get, etc)" 
I saw that someone uses these jars:
jersey-core-1.11
jersey-json-1.11
jersey-server-1.11
jersey-servlet-1.11
The last one jersey-servlet-1.11 I saw the first time and i tried adding 
it to my POM. And guess what: Works. The missed class 
com.sun.jersey.spi.container.servlet.ServletContainer is in this jar file.
Sad that no example about jersey I found in the web does not mention 
this dependency. And also sad that Netbeans didn't suggested this 
artefactId jersey-servlet when I invoked code completion in the pom.xml.
-Sven