We're in the process of restructuring our engineering site to more closely integrate it with the official Site5 weblog. The Site5 weblog will eventually serve as a single point of access for information regarding all goings-on at Site5--including engineering work.
We don't have an exact timeline on when the engineering site content will be fully integrated into the Site5 blog, but, in the meantime, be sure to check out the blog in its current form at: http://weblog.site5.com/
And, of course, our main site can be accessed at: http://www.site5.com/
-The Site5 Team