@Karlos:
I agree with this. MUI is not being developed outside of AROS and MOS. Hyperion are providing it as a "crippled shareware" version only so that people can run their older stuff; they would rather ppl use Reaction on new programs. The AROS/MOS crowd have spent way too much time and energy to give up on their effort, so I believe that the only way for the largest number of people to be able to use any given program is if that program has been written to use some sort of GUI abstraction layer. The user would decide what GUI toolkit to use, not the coder. If this abstraction layer happens to be one of the Linux APIs like Qt, wxWindows or GTK, so much the better; it will make porting many Linux programs a lot easier, and also help attract Linux coders because they won't need to learn yet another GUI API.
This is something that is definitely needed, but it's too big for a weekend coder. We need a determined team who has the respect and credibility of all three sides (AROS, MOS and Hyperion), because they will need to work closely with all three. In my opinion this project is a lot more important than getting an office suite, because we need anything and everything that will prevent people from thinking that writing programs for the Amiga is too much of a hassle. What good is an office suite if that's the only program you have?
@The OpenAmiga crew: if you're looking for a good cause to back, consider backing this one!