I just figured this out, so if you’ve had experience with using the Cutlist plugin for SketchUp, feel free to chime in.

I found this post on LumberJocks (http://lumberjocks.com/daltxguy/blog/5143):

If you’re a fan of Sketchup for creating woodworking models, then the next obvious step is to use 

Sketchup to help you create cutlists and layouts. Sketchup plugin Cutlist 4.1 does just that. CutList 4.1 sketchup plugin helps you determine how much of each material you need to produce your design, taking into account nominal sized lumber with allowances for finishing to final size.... click to read more.

I want to build the Jefferson Bookshelf from Popular Wood Working June 2011 and I needed to figure out how much wood I needed.  I downloaded the Sketch Up model and then used the cut list plugin to calculate how much wood I need and it was pretty slick.