Ji foody,
I'm not the ever-popular CocoaSpud, but I think that I can answer your questions.
There are basically two things that need to be done in order to get to version 1.0: finish the magic system and complete the battle system. It is definitely something that should be coming about sooner rather than later.
As for porting to Amiga, I don't think there are any plans for this now. It would be nice to one day have Dungeon Craft available on several platforms.