Here are various approved DNS-O-Matic images:
Too large to display here, but useful for print and other hi-res needs: 2000x649
DNS-O-Matic is a trademark of OpenDNS, LLC. The above images are for use in connection with DNS-O-Matic. OpenDNS grants you permission to use the individual images exactly as they appear for online promotion of DNS-O-Matic or compatible services. You may not edit, alter or tamper with the individual images. We request the images be linked to http://www.dnsomatic.com/ when used online.
Provided that you abide by the above guidelines, no further written permission is required, necessary or forthcoming. If your intended use does not fall within these guidelines, you must contact OpenDNS to obtain special permission. OpenDNS reserves the right to alter these guidelines at any time and will post any changes on DNS-O-Matic website.