There has been an overwhelming response to our recent two-day course on utilizing Open XML (the course sold out in record time).  Unfortunately, we cannot create more seats in this class; however, there are some great self study resources we can point you to.  First, there is a great webcast on Open XML development delivered by Doug Mahugh.  This is a great way to get started.  Many other useful resources can be found at the OpenXMLDeveloper.org site.  The whitepapers, case studies and examples there are extremely useful.  If you have further questions, please do not hesitate to contact your ISV AE.