Over the weekend, I performed a bit of site maintenance - installing the latest security patches on my server and preparing my wiring closet for the introduction of a new firewall appliance - and so I'd disabled logins to the Handbook. Sincere apologies for any inconvenience that may have brought you, but the site is now back online.
Most sites don't have this luxury, of course. We live in an age of continuously-evolving software, software-intensive systems that simply cannot be turned off. The navigation system in my car brings such a system to mind: so many commercial devices rely upon the global-positioning satellite system that we take it for granted. One must realize that GPS is actually provided at the pleasure of the US DoD, under the NAVSTAR program. At the same time, the European Union is considering an alternative, non-military system (Galileo) an effort that is rife with political angst.