My own unpublished contribution is a refinement of this particular plan which strips out those pieces not strictly needed for a seed UFAI (these components being learnt by the AI rather than hand coded), and tweaks the remaining structure slightly in order to favor self-modifying agents. The critical path here is 2 years assuming infinite resources, but more scarily the actual resources needed are quire small. With the right people it could be done in a basement in maybe 3-4 years and take the world by storm.

If you've solved stable self-improvement issues, that's FAI work, and you should damn well share that component.