DNS Performance Test can test the performance of your dns server and show the results in a handy chart. It will resolve the ip addresses in random order of the included list of 10,000 domain names inside the domains.txt file. You can edit this file if you wish to test different domains.
MISSINGPERSONS This is cool! I've wanted to use OPENDNS for a while but it's so many hops away from 4.2.2.* that I really didn't have an objective way to test it.
It would be cool if this app could make the data available so I can do my own stats on it. Perhaps it's around, I just have to look into the bowels. (Version 0.8.5)