Forum .LRN Q&A: .LRN Infrastructure / Architecture

Hi all,
Here is a graphic about the .LRN Infrastructure / Architecture, I hope people will find it useful.
Many thanks to Frank and project open for sharing the basic structure idea, and also to the original infrastructure graphic from .LRN, which gave use a start to build it.

The graphic is here:
http://www.openacs.org/storage/view/lrn%5C/infra.png

The photoshop editable source file is here:
http://www.openacs.org/storage/?folder%5fid=976695