Dungeon Fantasy(DF) and regular GURPS 4/e questions (Yrth too)

[Bruno]

Originally Posted by scc

This would ideally require two magic systems so that the stuff you get from the dungeon is really worth getting, that is we can't make it anymore. So how did you handle that?

Why would you need two magic systems? "We can't make it anymore" can be simply due to "nobody knows how" (lost craft secrets that haven't been reinvented yet) or "There just isn't enough mana/divine intervention/virgin wyvern testicles any more".
We're only finally reinventing the full Roman marine concrete recipe, and it's not like the chemistry of concrete has changed in the two-thousand-odd years.

Originally Posted by scc

Wasn't there an official licensed GURPS port of one the D&D settings?

Nope. They did World Of Darkness, Castle Falkenstein, and Deadlands though.