Well, I am in the painstaking process of trying to port PrBooM to Panther. I am 65-77% sure I can come up with something that works by the beginning of January. I should learn SDL programming, but I don't think the authors are using that.
Also, two key factors in development motivation are as follows:
I will work on it as I get days off from work. I work 8 - 18 hours a week at work, and my job doesn't mind working on code outside of work, but they are soon going to pass a new rule and I may have to sign something, if worse comes to worse and you all want to see a carbon port, I can and will quit my job.
I know I know, "DAMN STARVING PROGRAMMERS!" :-D