This couldn't have been done without K2. It makes massive use of template overrides - almost every view is overriden to a greater or lesser extent.

It also makes extensive use of the new extra fields variables introduce in 2.6.2 - it triggers twitter feeds for speaker profiles, downloads of their PDFs, even controls the width of the news items and sets the appropriate image size for them.

odemanagement.com/

It's also done with as few Joomla extensions as possible. Apart from K2, we use Phoca Download. RSForms Pro and a couple of others. Almost all the interaction (tabs, slideshows, the speaker category view with direction-aware hover) is handled with mod_k2_content and jQuery.

It also features integration with Video service Viddler (Which I modified AllVideos to make use of) and has the only Masonry-driven news view that I've seen that isn't run by modules.

Hope you like it.