Rocael:
Yes, the grade book will be a place to store a users grades.
Complex Survey should cover most online testing needs.
New-portal in the diagram represents moving infrastructure out of .LRN that should be in OpenACS. https://openacs.org/forums/message-view?message_id=92143 We want to share as much infrastructure as possible with other projects forming around OpenACS. Another example would be getting .LRN to use a new and improved acs-subsites https://openacs.org/forums/message-view?message_id=92524 (check out the mockup link in the first post)
Synchronization with back-end systems is something Heidelberg needs. We hope to cover do this with the cooperative funding of the AuthN work. https://openacs.org/forums/message-view?message_id=92263
A SMS broker exists (just search the boards).
Please post anything you would like to see in .LRN 2.0 here.