Hi,

if you are using CMake (well, all of you are :-) ), I finally took the time to 
write a page at techbase which documents (hopefully) all changes to our 
buildsystem in KDE 4.2 compared to 4.0/4.1:
http://techbase.kde.org/index.php?title=Development/CMake_KDE_4_2

If you have questions, or if something is unclear, let me know.

Enjoy :-)
Alex