If you mean clean, you're probably familair with BISSELL.com. The site offers a huge product catalog for site visitors, listing every gasket, bolt, and brush dynamically paired to each BISSELL product. The user comes first in all that BISSELL offers, with logical navigation and product selection all controlled through the CMS.
BISSELL's wildly successful Pet Photo Contest is also a creative extension of the CMS, converting customers into fans by the tens of thousands. Users are engaged, learn more about the BISSELL product line, and lots of "awww, how cute" comments create a tighter bond to the BISSELL brand.
C2 has augmented the CMS experience for BISSELL Homecare, adding customized administrative and reporting abilities, a robust product index with up to 20 search attributes per product, use of multiple taxonomies to build refinement options, and powering interactive JavaScript elements with Ektron's native XML output. Our work allows marketers to be marketers and techncians to get their nerd on without interferring with product sales.
For the pet contest, we used an Ektron SmartForm to manage the "voting" period, and each entry was submitted via a custom .NET form as a content block to the CMS. The pet photo submissions were uploaded via Flash and AJAX to a separate server, giving the submitter cropping capabilities before final submission.