Not yet - but I'm about to.  I have a batch that is supposed to be hatching out tomorrow with some Welsummers that I am getting from one of my breeders.  I hope to pick them up on Saturday.
Once you see my last name, you'll probably quickly guess one of the reasons why I'm getting Barnevelders.  Another reason is because I understand they are rare now (not withstanding that the hatcheries have begun to sell them unfortunately) and I know their egg color needs to be worked on.  So, since I enjoy the challenge of improving a breed, I thought the Barnevelders would go well with my Ameraucana and Welsummer projects.  Although I won't be able to devote a whole lot of focus on them for probably two years.
Lastly, the breeder I am getting my birds from was one of the original five folks that got the Barnevelders and Welsummers accepted into the APA at Vancouver, WA in 1993.  He is where I got my first Welsummers from.  His original birds came from Germany.  I am also hoping to get some Barnevelder and Welsummer chicks or birds from one of the other original five breeders and his birds came from the Netherlands and maybe Wales too.  I can't remember for sure.
The temps here have been colder this year that I recall in a long time.  It got down into single digits in December and we had temps below freezing last night with a dusting of snow.  So I will be able to tell you more next year as to how they handle the cold but I can't imagine it's that much warmer three hours south of me where I'm going to pick up the chicks.
I'm looking forward to being the happy owner of Barnevelders!
God Bless,