Microsoft will be offering a complimentary two-day Open XML Technical Deep Dive in San Francisco, CA on June 18-19, 2007.  If you are a developer and interested in the practical details of Open XML schemas, architecture and programmability, this is the event for you.

More information including the agenda and registration may be found here.  Attendees should bring a laptop with .NET Framework 3.0, Visual Studio 2005 SP1 and Office 2007 preinstalled to participate in the hands-on labs.