Jeff Woolsey, Microsoft Group Program Manager, has a series of blog posts which explain Dynamic Memory in Depth, what it means for Hyper-V, and how it will help server virtualization capacity.

Dynamic Memory Part 1: http://blogs.technet.com/virtualization/archive/2010/03/18/dynamic-memory-coming-to-hyper-v.aspx

Dynamic Memory Part 2: http://blogs.technet.com/virtualization/archive/2010/03/25/dynamic-memory-coming-to-hyper-v-part-2.aspx

Dynamic Memory Part 3: http://blogs.technet.com/virtualization/archive/2010/04/07/dynamic-memory-coming-to-hyper-v-part-3.aspx

Dynamic Memory Part 4: http://blogs.technet.com/virtualization/archive/2010/04/21/dynamic-memory-coming-to-hyper-v-part-4.aspx

Dynamic Memory Part 5: http://blogs.technet.com/b/virtualization/archive/2010/05/20/dynamic-memory-coming-to-hyper-v-part-5.aspx