Yesterday, we launched Encore Symposiums on the Drupal 6 platform. The group had previously been on a homebrew CMS, and came to Jon and I with hopes of a platform that would allow them to manage every aspect of their site. Drupal fit the bill nicely.
The site provides nearly 20 custom content types, built with the Content Construction Kit. We used several views throughout the site, but will be converting the remaining few to custom code for increased scalability and efficiency.
We used SlideShow Pro for the homepage seminar teaser, wired up to an XML feed generated by Drupal.
We also built-in integration with Google Checkout to allow registrants to sign up for seminars right on the site.
Check it out and let us know what you think!