I recently put sflinsider.com live, a redesign of a site that was using a custom CMS that just couldnt cut it.
SOUTH FLORIDA INSIDER:
www.sflinsider.com/
Anyways, K2 was a great solution for dispalying all of the content and article types within this site.
I am using a Youtube Flash player from activeden for the youtube videos. They automatically pull in his latest video from a playlist. Combined with K2 there is a lot going on on the homepage, and throughout the site.
There is an error with the mp3 player not working on some pages that I jsut posted here on the forums, but I thought I'd submit this to the showcase section as it's been awhile since I have done that for a site and this site came out quite nicely.