During my time at the Orange County Library System, arguably one of my biggest projects was redoing the back-end XML functionality on the Homeschool Resources and College Bound e-Guides by hand.  The imagery had already been done by another member or the Digital Asset Architect team, but they tasked me with the responsibility of making the mess of code behind the scenes clean and functional as well as editing the text in numerous areas in order to give it a clean look.  The guides can be found at the following links:

Homeschool Resources:
http://www.ocls.info/Virtual/eguides/homeschool/default.asp

College Bound:
http://www.ocls.info/Virtual/eguides/CollegeBound/default.asp