Sounds interesting. I'd never heared of DNSCurve before. What's the current level of rollout? How many sites are using DNSCurve? tens, hundreds, thousands? Any major sites? Wondering if it's worth my while looking into yet...
My own research suggests there are very few sites using it currently. OpenDNS supports it, but only because they prefer it to DNSSEC as it allows them to continue to modify returned results whereas DNSSEC wouldn't.