Earlier this week, OpenDNS announced the “technology preview” availability of DNSCrypt, a function that encrypts your DNS traffic before it is sent to OpenDNS. Much like SSL encrypts HTTPS traffic, DNSCrypt should prevent others that are seeing your traffic (like your ISP) from being able to snoop on your browsing traffic. Right now, it is only available for Mac but a Windows version is planned for the near future.
DNSCrypt uses elliptical-curve cryptography and works complementary to DNSSEC, each serving different functions.
You can read the FAQ about DNSCrypt and download the needed software for Macs to use DNSCrypt from http://www.opendns.com/technology/dnscrypt/