To short circuit any confusion, right now these tgethr groups are private and more private :) (using email encryption). You can't give out a tgethr address to people outside of your group and have them be able to email that address. Though we are attracted to this feature, it obviously opens up the group to spam which seems to still plague Google Groups. Still pondering this one.

Currently for this purpose of a public@somewhere.com (like our support@ type emails at Inkling), we use Tender (tenderapp.com) which does a great job already of managing a public discussion, support queues, etc.