Yep, dns-01 went live in January. If your DNS server happens to support RFC 2136, take a look at lego[1] - some other provider-specific plugins for DNS are included as well.
I'm not too worried about the DNS integration; we have a fairly easily-automatable DNS infrastructure owing to the fact that we're frequently changing records around. I'll have to see if we can take advantage of lego to avoid some work on our side.