Cross Platform Build Systems

There was some dicussion a while back about this . . .

Since I am a big proponent of Ant for Java build systems for obvious reasons,
I went searching for alternatives to plain old "make" for Torque

Seems that Ant's success has started some serious projects that are aimed at bringing the same
cross platform build management systems to provide C/C++ developers with the same ease of use
and cross platform support that Ant brings to Java ( and C/C++ to a much lesser extent ).

http://scons.sourceforge.net/
http://www.cmake.org/

These are the two I am evaluating for using to manage my crossplatform efforts with Torque.
Anyone have any experience with either one?

May be worth the GG guys evaluating something like this as a "standard".

CMake will actually generate IDE specific project workspaces and what not.
I just discovered scons tonight.