Even tho we haven't got the holy buzz of Rails, people seem to be putting up new Catalyst-powered sites all the time. I'll try to mention some as I hear of them in the future, here's a couple to get you started

www.discvrevolt.com

21:17 <bert_> it is for independent artists to be able to easily sell card at 
              their live shows, and fans use them to dl songs from our site 
              when they get home...
21:18 <bert_> site went from concept to production in 3 months...
21:18 <bert_> you guys here helped us through the rough part, none of us had 
               used catalyst before this...
21:18 <bert_> we really appreciate your help

Let's get dugg

This is a neat blog powered by a new Catalyst-based blog software called Typeface. Typeface is downloadable right now, so feel free to check it out.