This New Times Los Angeles Online article (I believe this is a free newspaper published by the same folks as the Dallas Observer) that focuses heavily on violence in gaming, quoting Xatrix' Drew Markham heavily about the subject as it relates to Kingpin: Life of Crime. One of the noteworthy portions of the article (pointed out by sCary) is this bit, that seems to confirm the rumor that Xatrix is working on a Wolfenstein-3D follow-up called Castle Wolfenstein 2000:

Markham is currently overseeing his employees as they work constructing three-dimensional Nazi soldiers and prisoner-of-war camps on their computer monitors. His company, the West L.A.-based Xatrix Entertainment, is already well into the creation of its newest game, a reformulation of a popular World War II POW fantasy that has enjoyed two previous incarnations by other companies. Markham and his handful of computer artists and programmers hope to have their Castle Wolfenstein 2000 in stores by Christmas next year.