Project Metro is a new name  for the JAX-WS + Project Tango combination. JAX-WS is the standardized web services stack
and Project Tango is the  Sun's Java Web Services interoperability project with
Microsoft's Windows Communication Foundation (WCF).

Project Metro is released and so is the  release of   GlassFish V2 FCS (b58g). 
GlassFish V2 Embeds the Metro 1.0 Stack within it thereby making WebServices functionality directly
 usable from GlassFish (without the need for any extra downloads or installations).

WebServices Reliable Messaging (WS-RM)  is one of the enterprise features in  Project Metro.
Now we shall have a brief rehash of  WS-RM  in Metro 1.0 and what would be the new
features in upcoming releases

WS Reliable Messaging in Metro 1.0
WS-RM 1.0 is based on the following standards

• WS-ReliableMessaging specification
• WS-RM Policy Assertion

The programming model when developing  webservices applications with Metro is the same old JAXWS Programming Model and
nothing new is required to be learned. 

Adding WS-RM, Security and other Quality of Service features to the  JAXWS webservice is enabled
via configuration files which can be handwritten or easily edited by Netbeans.
WS-RM is enabled in endpoints by the presence of RM policy assertions in the WSDL. Netbeans IDE will  provide
configurable settings to easily enable RM in endpoints.

Here is a brief overview of WS-RM. The tutorial provides detailed instructions on how to work with Metro.
This is a  screen cast which show how to easily enable WS-RM when working with Netbeans. For more information ,
instructions on how to use Netbeans with GF are also available here.

Future plans for WS Reliable Messaging 1.1

• Web Services ReliableMessaging Policy Assertion (WS-RM policy ver 1.1)
• Web Services Reliable Messaging ver 1.1

We have started working on these features on our trunk and you can get the latest nightly and try out and give us feedback at users@metro.dev.java.net .