I don't know if I understand those metaphors correctly, I'm not familiar with Jetpack nor Thingiverse. You mean that a Moodle teacher account in a Moodle host could be linked to a MoodleNet account?
Could you expand on what would mean having social networking with other teachers from their Moodle instance?
And what do you mean by having better security and reduced costs in Moodle hosting?
I don't know in other countries but normally here teachers also have the role of "instructional designers", and in my case also sysadmin ;)
Sorry, I don't have too much time to answer but I just introduced myself!