+1
Maybe something like (or more condensed)?:
The overarching goal of Test the Web Forward is to get the Web development community involved with Web standards on an ongoing basis, so after the event, please follow up on pull requests to make sure that they are getting reviewed.  Follow up with attendees that submitted PRs and encourage them to continue to participate by submitting more PRs and asking them to respond to feedback on the PRs that they have posted to Github.