Does Sketchup 8.0 take advantage of OS X multiple cores?

The question says it all. Actually my real question is which would be better: a 4.0G 4 core machine or a 3.5G 6 core machine?

In a word, no. A faster CPU is always some help, but no version of SketchUp to date uses multiple cores. For many operations, a faster OpenGL-compatible display hardware will have an even bigger effect.