I was the one who started the mozamiga.mozdev.org thingy - I mistakenly thought that I could rally some Amiga coders to get together and bang out a DE port. At the time, Amiga OS 4 really wasn't even heard of. Now, I'd recommend an OS 4 native port of Chimera, because Amiga Inc. has changed their tune. I suppose I could update mozdev to this effect, but it just seems that no Amiga coders give enough of a rat's ass to actually spend some time on this project.
If anyone wants to take over the mozdev thing, let me know. I'm not a coder, and it would probably help if the project owner was an active coder.