Quoting nate at refried.org (nate at refried.org):
> No, kbuild as in the build system for the Linux kernel.  The current
> system is a bunch of recursive Makefiles.  kbuild 2.5 was written by
> Keith Owens to solve the inconsistency problems with the current build
> system and add some very nice features.  It generates a global Makefile
> with complete knownledge of every kernel file that needs to be built so
> make can do it's job. 

It looks like it's still in beta?

I found the dancing_makefiles, but not much else.
-- 
Bob Tanner <tanner at real-time.com>       | Phone : (952)943-8700
http://www.mn-linux.org                 | Fax   : (952)943-8500
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