This is from his website:
NOTE (11/29/2011): I received an email today from Google indicating that Roam Control was removed/suspended from the market. I did not receive any explanation, other than it was "due to a violation of the Developer Content Policy." I'm working on getting the app restored, however I've come to understand that Google is incredibly unresponsive in these situations. If I cannot reinstate the app, I will certainly make it available in some other fashion. To those who have already purchased the app, I certainly do not expect anyone to pay for it a second time. As a temporary measure, the latest version of the app can be downloaded off the website.
Roam Control