Go through the wireframes and mark them up with how you will implement each part using WordPress. Is each component going to be covered by a specific plugin, a custom loop, custom code? Identify every element and how you will accomplish the programmatic functionality.
Pull open all the wireframes being used to generate the HTML/CSS templates and save a new copy of the wireframe pages, marked up in Illustrator/Photoshop/Whatever with notes about what you will use to generate all the parts.
Here’s a sample using Mike Sinkula’s RIW wireframe: