Yes - and no!
There actually is kind of such a thing. Though it's not a source-port (Lucas Arts will never give their source away!) but rather a re-write from scratch and it is not an OpenGL "port", but a Direct3d one. Now for another problem: It's not public.
A sad story short: In 1998 a very good coder was already so much done on his project, that the first level was playable. But somehow... He was cussed at in a really bad way for "being lazy" by some people over at the DF scene. First he decided to make his game region-depended and to exclude everybody except Europeans from using the game. But soon thereafter he was insulted in an even heavier way and beeing a sensitive person (that's what he said himelf) he could no longer bear it and withdrew from the DF scene - officially canceling the port.
I'm totally sure that he has continued it for himself. Heck! He hat even started multiplayer support for it via Direct Play... All that happened back in the last quarter of 1998, I think. And it's a real shame as this game is quite a gem IMO.
I'll try to find some more information, if anyone is interested.