I have just added the Sinciput servlet to the SVN repository at Google Code.
This new servlet has not been thoroughly tested (it has been tested a little, though), and it is certainly far from finished, but it is checked in and it runs.
Sinciput will work by loading a number of special classes, mainly command classes and descriptive Enums, which will then be used within the Rhizome command architecture.
I anticipate that once I get going on Sinciput basics, things should progress quickly. But at the outset, the difficult tasks will be coding the commands, and getting the dynamic Enum-based data model working.