I have finished the ui, and committed it to CVS.
The only know limitation is with FeatureType Editor - you can view but not edit schema.xml information. Generating everything or providing your own schema.xml work fine.
What is in CVS right now is likely to be the 1.2.0 beta, in fact David intended to release it as such this morning but is bit short of time. We are both madly writing user documentation and such.