He has been working on and off with roguelikes for a few years now. His current project is Woods of Torbin, WoT for short (http://www.geocities.com/kostatus/). A fantasy-themed roguelike that was initially inspired by Thomas Biskup's ADoM and was aspiring to be very smilar to that game, but now with ideas moving away at a new tangent from the old game. The latest release of WoT is long outdated, but he has actually made significant improvements since the latest released version (or so he claims).
He is still working on WoT but has started a complete remake from scratch - using Java.
Apart from being a developer, he has a review page for roguelike projects (http://www.geocities.com/kostatus/reviews.html). He finds this a great excuse to try out all the great new projects out there, and to gain some ideas for his own.