What's the final verdict on the Dark Souls port? I know the resolution can be fixed. Any other weird issues with it? Still the best version to play?
Best version for sure with the caveat that I found it easier to connect to other players on PS3. Durante's fix addresses more than just the resolution too - unlocked framerate, AO/DOF/AA options, texture swapping, skipable intro logos. It looks really great on PC.
Is it a marked improvement over Demon Souls? I bought that game a year or two ago but could never get into it.
It took Dark Souls for me to really properly get into Demon's Souls. It's a more forgiving game to new players. For one thing, you get health potions when you respawn and you're not permanently stuck with half your health when you die.