We know WebSphere MQ is a huge topic, not only in scope, but also in importance to our GWC members.  We hosted a webcast recently with security expert T.Rob called "What's New in WebSphere MQ v7.1 Security?"  If you have any security concerns, you should watch the on-demand replay, now available on the site:

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Abstract:
Wondering whether to upgrade to WebSphere MQ v7.1?  Concerned about security?  If the answer to these questions is "yes", then this webinar is for you!  The theme of the v7.1 release can be summed up in one word: Simplify. Learn how WMQ v7.1 features can replace channel security exits, reduce complexity, and consolidate security configurations into a single MQSC script.  See how WMQ v7.1 enables security by default to block remote attacks.  Find out how to streamline administrative tasks while improving security granularity.  The presentation will also discuss how the new features interact with WebSphere MQ File Transfer Edition and WebSphere MQ Advanced Message Security to provide a single secure environment for messages, files and applications end-to-end.