I apologize for the lack of news about Duffers. Allow me to give a brief history and news about the future:
In a nutshell, Duffers Golf for UT2004 is essentially dead. There was a short period where we were actively working on a version titled Duffers Mini Golf, but development on that has ceased as well. Members of the team had real-life issues pop up (babies, etc) and we just couldn't seem to find our way forward.
I personally played around with a few ideas for other projects, but finally decided to tackle a standalone version of Duffers on my own. It will not be a mod, but a full downloadable game. I don't have much detail beyond that, but you can follow my development blog at
http://www.mixworld.com.
I realize it's a little insane to try to take on such an endeavor by myself, but I won't have to rely on others, meaning its success or failure rests entirely on my shoulders.
As I mention in the blog, I'm in the early planning stages. When I have more to show, I'll be posting it on
http://www.duffersgolf.net, the game's new home. As I also mention in the blog, the game will most likely be free to download and play, so I hope you'll give it a shot when it eventually releases.