Re-launching Microsoft News Center was one of the most humbling projects of my career. Bringing Microsoft off of their proprietary content management system to WordPress was both a challenge and a joy to do.
As a part of the migration and back-end development team, I was given the opportunity to solve some of the more complex problems you would expect to face trying to migrate a proprietary system.
Creating solutions for XML, XSLT, and HTML content imports was great fun. Other features include custom search filtering, multi-site migrations, custom product galleries, and not to mention the multitude of back-end features such as custom post types, taxonomies, and even a sweet custom content editor.