We discovered MODx through Etomite. With Etomite we did this site:
http://www.tacxvr.com/
Then we discovered and switched over to MODx. We started out with:
http://www.scuba4u.nl , a fairly basic (boring?) design for which we are not really responsible (only the backend

Another one, much better design imho:
http://www.retailjaarprijs.com/
and the last one we did with MODx:
http://www.sonnema-basecamp.nl
which is basically a 100% flash website where we use MODx to manage the content and incoming data through AMFPHP flash remoting.
Olaf