It's funny you should say that, look what is currently open on my Desktop
NovaCoder, you are a god among men!
I did see that there is a (Really... REALLY old) version of exult for the Amiga, but it's RTG. And the original question was Ultima 7 and Savage Empire. Exult of course covers Ultima 7 (and unless my information is way out of date) doesn't support the Ultima 6 engine, which is what Savage Empire and Martian Dreams uses.
I recently found that someone had redone Eye of the Beholder 1 and 2 using AGA instead of ECS, and was thinking that Ultima 6 would be SO awesome (and needed) to be upgraded to AGA, and have the two 'Worlds of Ultima' games 'ported'.
Unfortunately, last I checked the Exult equivalent for Ultima 6 (Nuvie) wasn't really near being usable.
But I don't want to distract you from your awesomeness, please continue porting Exult to AGA! Then we'll be able to at least play the Ultima 6 rebuild (using Exult) and Ultima 7!
slaapliedje