JAX-WS 2.2 is integrated into JDK 7 b100.
$ ~/jdk1.7.0/bin/java -version
java version "1.7.0-ea"
Java(TM) SE Runtime Environment (build 1.7.0-ea-b100)
Java HotSpot(TM) 64-Bit Server VM (build 19.0-b03, mixed mode)
$ ~/jdk1.7.0/bin/wsimport -version
JAX-WS RI 2.2 in JDK 7
I tested with few samples, and they all worked fine.