KDE and CMake in depth
The Road to KDE 4: CMake, a New Build System for KDE
KDE Dot News has an in-depth article on why KDE has chosen CMake as its build system for KDE 4 in place of the old system, the GNU Autotools (in short, ease of use, portability, need for fewer tools and speed). Scribus, Rosegarden, PlPlot and my own QTM have also switched.