The new Idle Thumbs Podcast archive site is built on Fuel (apart from the forums):
http://www.idlethumbs.net/
The front of the site is fairly simple, but there's also a management interface for managing podcasts, episodes, and feeds.
Wish I could take credit for that part, but I just did the php and server side of things
I do know the CSS is all from scratch for the public side of the site. The management site uses Twitter's Bootstrap framework, though.
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I do know the CSS is all from scratch for the public side of the site. The management site uses Twitter's Bootstrap framework, though. 
