A couple of examples of CSS Reset files to get you started on common ground.
#yui
Yahoo! UI Library: Grids CSS
The foundational YUI Grids CSS offers four preset page widths, six preset templates, and the ability to stack and nest subdivided regions of two, three, or four columns.
Jack Slocum’s Blog
Awesome website/blog froma guy who’s working with the Yahoo UI elements to the extreme.