We have been experimenting with DNN for a while and have created a couple of different sites on a DNN base.
The first site is
http://www.vogardesign.com This is currently being updated with new features being added to it.
The second site is
http://www.vdsoc.com This is a active social based social networking site that we have established and is being aimed to support a couple of DNN based games sites we are building.
We still have a lot of tidy up to do with regards to CSS files and setting the page SEO optimization to maximize search engine ranking but this is an on going project for these sites.
We would be interested to hear your views on our sites
Thanks
Andy