The Java EE 6 Web Profile development, including CDI, JPA 2, JAX-RS and other goodness can be found in the snapshot builds page. No official releases of this code has been made yet.
These are up-to-date snapshots streamed from our continuous integration system after successful build/test. New as of the end of July, we hope these can tide you over till we can get an official beta build together.
See the extensive list of examples being developed for Java EE 6. All are functional and tested before publishing. Some are documented. These also stream from the continuous integration system.
No official releases of TomEE as a Java EE 6 Web Profile have been made yet. There is a stable release of what inspired TomEE available on the download page. These are Java EE 5 level and do not contain any Java EE 6 features aside for partial support EJB 3.1.