In the What's New page for the upcoming FreeBSD 10, I see that the venerable (infamous?) bind is being replaced with LDNS and unbound, I found the related project NSD, also created by Stichting NLnet Labs.
This is good news. I've always been looking for a bind replacement because it is so large and unwieldy.
Late last year I started researching NSD to replace my bind server, and I've more or less decided I would switch over to it in 2014. But interestingly NSD doesn't have the thing I wanted the most: a clean zone file format. The config files are all sane now, but NSD more or less keeps BIND's zone file format. This page has some examples. Contrast this with DJB's tinydns which has an excellent zone file format, really short and succinct and hard to type in wrong.
Nonetheless, a couple of the primary ROOT servers are run using NSD, so that's very good to hear.
Will report back on my NSD adventures after I switch over.