phranque - 11:04 am on Oct 30, 2012 (gmt 0)

where is the logo?
that is an unfortunately-named brand!

however the story is about "open (lower case 'o') DNS resolvers"

open DNS resolvers are those which allow external requests for recursive domain name resolution.

you can test for open DNS recursion using the dig command:
dig @NAMESERVER.DNSPROVIDER.COM example.com
where NAMESERVER.DNSPROVIDER.COM is the DNS being tested such and example.com is a domain NOT using that nameserver.