While chasing the recordings and presentations of the Microsoft Dynamics NAV 2009 R2 Developer Day 2010 I was pointed by an MS employee to this page: Microsoft Dynamics NAV 2009 R2 Partner Readiness Materials.
All NAV 2009 R2 material that has been released so far can be found here and all that still needs to (like recordings and presentations of November 10 R2 Developer Day 2010) will be published under these yellow marked headings soon: