I'm going to address a few things in this email...hehe.  :)
First of all, I'm all in favor of people introducing ports to teh GBA/Palm/Windows CE.  My only problem is that I cannot contribute to the effort.  :(  Sorry guys...I wish I knew how to program or something, but I'm *VERY* bad at it and will leave it to the better minds.  I'm a decent beta tester, but I somehow think that everyone and their brother on this list would be more than happy to volunteer their services toward that segment of the project.
Secondly...the level of reverence for this game brings a smile to my face like few other things can do.  It's almost twenty years after this game was released, it's about a dozen chipset generations after it was released, memory use has skyrocketed (I used to play it on a 48K Apple II machine running at a couple of MHz, and am now working on a 2.5 GHz machine with a gig of physical memory), and I cannot help but sit hungrily wanting to play this game in its original version.  That is quite telling...quite telling indeed.
Thirdly, it's *still* a fantastic game.  I guess that's what the previous two paragraphs were saying too...but I had to say it bluntly I guess.
I was at least one of the people who was suggesting a pure AR emulator.  I got the idea from the M.U.L.E. (another phenominal game) only emulator for the C64 and brought it up.  I don't know how hard something like that would be.  That said, there is one thing I can do that could help get the emulator started in a small way:  For an emulator that'd run both The City and The Dungeon without endless manual disk swapping and and skillful emulation, I'd be willing to pay about fifty dollars.  That may not sound like a lot, but I bet there are a number of other people on this list that'd also be willing to pay that much (unless they don't have the same problems with pretty much all emulators that I do since I've moved to Windoze XP).  It might add up to about two grand or so all told...not a ton of money, but if it doesn't take a terribly long time to make it, it might be worthwhile for the person who writes it.
Anyway, it's an idea...please don't flame me if I'm wildly offbase.  :)