The Iranians do appreciate the world's moral support, but they would heavily condemn and resist any direct outside meddling in their internal affairs.
Obama is playing this close to the vest and I think, correctly. Say what you need to say, but initiate no clumsy half-assed initiatives that can be politically exploited by the hardliners. Down the road, the US will have to interact with an Iranian government. Exactly what government that may be is an unknown quantity atm. This is yet another political handicap that must be considered in framing a cogent yet elastic response to events.