All, I have submitted a podling name search on behalf of Apache Usergrid, you can find it here: https://issues.apache.org/jira/browse/PODLINGNAMESEARCH-67
Other than a couple of instances in google returning results that match a list of users in a grid component it appears that this is a well known name associated with this project. I highly doubt it will be an issue to continue using the name. One weird thing was that when I searched for Usergrid on USPTO I expected to find Apigee/Usergrid somehow. No matches. John
