DaveP says he's got it "kind of working" with ReAction but that noone was willing to continue the project. How about putting that source code on the page for download? This would probably be a good start!
However, being the sceptic that I am, I don't think that a working and stable Mozilla port will ever become reality, at least not in a couple of years. I don't want to disrespect anyones efforts here, but just take a look at the AWeb Open Source project, nothing much has happened there (except that we finally have a free web browser on AmigaOS, which is good).
First of all, I think a 68k port would be useless. Mozilla is dog slow on a PII 333MHz/256MB RAM both on Windows and on Linux. A PPC port would be the way to go, which clearly narrows down the number of developers able to participate in the project. Then we have the issue of operating systems. A port for OS3.9 doesn't seem very clever with OS4 lurking around the corner. But when WILL OS4 be out? And when will there be developer documentation? Will the hardware to run OS4 be available for everyone (IE a cheap A1)?
Should it be ported to OS4/A1 or MorphOS/Pegasos? How compatible will these systems be? This will further narrow down the number of developers, probably splitting the dev team in half because of what platform they prefer (not taking a stand to which platform is "better" here, just that you have to make a choice on which version to work on).
But if I'm wrong, noone would be happier than me!
Edit: One more thing - I don't think money is an object here. At several occasions I have been asked to make web sites for friends and colleagues on my spare time. These projects would probably amount to no more than a week of work (or three weekends if you will) and I've been offered about $1000 for each project. However, I have NEVER accepted such a project just because I don't want to work on my spare time (coding on my own self-thought-up projects doesn't qualify as work). Since there's money involved here, the programmers will feel obliged (sp?) to produce something since every donor will want to see results, which would make it less of a hobby and more of a part-time job.
