For the executive summary, see Synchronization Architecture
Good overviews of parts of the system are on Howard Stearns' blog, although mostly dated or not yet implemented, it's the idea:

• http://inventing-the-future.wetmachine.com/
• http://inventing-the-future.wetmachine.com/content/distributed-systems-part-2-off-island-data
• http://inventing-the-future.wetmachine.com/content/what-the-dormouse-said
• http://inventing-the-future.wetmachine.com/content/inventing-the-future-jasmine-release
• http://inventing-the-future.wetmachine.com/content/enter-hedgehog
• http://inventing-the-future.wetmachine.com/content/inventing-the-future-secure-persistent-objects-take-0
• http://inventing-the-future.wetmachine.com/content/collaborative-initial-connection#more-769
• http://inventing-the-future.wetmachine.com/content/scalable-information-management-by-information-interfaces-and-peer-editing#more-382
• http://inventing-the-future.wetmachine.com/content/digital-clutch
• http://inventing-the-future.wetmachine.com/content/well-no-one-told-me-about-her-shes-not-there-the-zombies