Everyone I know who's tried it thinks it rocks. I tried it. It rocks.
Exult
Load/Save games working. Spell-book/magic system underway. Map display done. Pathfinding all over the place.
We've come a hell of a long way. I'm constantly surprised by how far, but I expect you've all guessed that by now.
We discovered that the audio was done by the Miles Sound System (v2.14). Tried to get information, and failed. Then the author released that version to the public. Been looking at the code. Horrors. Lots of assembler, some binary-only drivers and DOS code with far pointers. I've just looked through the code, but it looks like being a long road.
Still, we have something to work from, and something is often better than nothing.