I'm building tools for maintaining our Google Apps for Business account.
Is there anyway to post content into a Google Group that isn't email? Ideally from within Apps Script but i'm in no way averse to using AppEngine or other exposure to API to achieve this end.
The essential use case is to be able to extract labelled email in a users account and replicat
Google just today announced the new Google Groups Migration API that allows you to import messages into a Google Group. The messages will not be sent out to group members via email but will appear in the group archive which sounds like your end goal: