I could be wrong, but I think Sduibek might be waiting to finish the latest release of Fixt before finishing this off. I don't know if anyone else is working on this.
Correct! Since I don't know how long it'll be until this is "done" (ready for public release and a sufficiently-playable state) I want to release the one last release of the Fo1 engine Fixt to keep everyone occupied in the meantime
Fixt 0.90alpha will include further customization options, in-game customizations, fixes for most of the remaining crashes, Steam integration option, some new implemented features that have been requested for a while, and custom playstyle enforcements (also customizable in-game).
That along with Crafty's Sfall/ddraw which has been included since 0.8.x, means you're getting a majority of the features you'd be getting in Fo2 engine, without waiting as long.
The main things missing from 0.90alpha that aren't possible in Fo1 engine are: party member functionality improvements, choosing to avoid random encounters, better random encounters functionality, and of course Fo2-specific things like the new Perks and being able to choose your race like in the F2RP. Finally, integration with available Fo2 mods/patches will of course become possible once using Fo2 engine.
But yeah anyone is welcome to work on it. Fixt source (Fo1 engine) and Fo1-to-Fo2 source are both available on GitHub.