Not sure if there was followup that makes this email obsolete. If so, apologies.
Both Justin & Shane have proposed ways for the survey to reach a wider audience than committers@. I think both of their ideas avoid any unsolicited email. I think expanded reach is very important. For the survey* results I presented at ApacheCon NA, inclusion of non-committers was key to many insights. What do you think of their ideas? Any other ideas? Kenn *survey of people at Google who self-identified as using or contributing to ASF projects
