Group Lists/Sets

I want to set up my team on Pownce to share info/IM/etc... but hate that anytime someone new starts (we're hiring 100 people in the next 2 years) everyone has to manually add the new people to their personal lists. How about making a way for people to create a 'group' that then can be subscribed to by everyone on the list? Then, when we need to add (or remove) someone, we do it once and everyone gets the updated list and can start communicating with them immediately.