Why would they start developing this again? Its not goign to make them any money, its not a professional package, just something to dap around with.
If you ask me, we should be asking them to release the souce.. I.e make it open!
[EDIT]
Infact, that screen shot gave me an idea. I think theres a few Amiga like apps running around and certainly some games that are open source. Such as UberPaint above! Although im guessing that the AROS guys did this? Cause i couldnt find anything like it on the web!
But theres also an application called "worker" which is a ripoff of that file manager for the Amiga... directory opus or something?

I've also got a shuffle puck cafe clone on my linux box that i play a lot! Maybe we should make a list of all the Open Source amiga-like apps that would be great to be ported back to either AmigaOS/MorphOS/AROS???

Because seriously, i dont think any company in their right mind is going to port back applications if they've already left it. Theres hardly any market! Plus, as i said, packages like DPaint arnt going to make anyone any money. I certainly wouldnt pay for it when i can get GIMP for free, which is much more powerful!