MarkB
Legend
For the record, I feel this is a bad feat - there is no need to encourage players to take multiple short rests. Destroys the pacing in my opinion. It also lessens the comparative advantage of the bards short rest healing buff.
Allowing players to use healing powers during short rests allows them to maximise the effectiveness of their healing surges, which means they'll be able to take on more encounters during the course of a day. In my experience, having a party limp back to town or camp in the dungeon halfway through the day because they're too battered to continue breaks the pacing far more fundamentally than allowing them a little more time between combats.
If the extra rests bother you, consider introducing a house rule to gain the best of both worlds - that characters may use Healing / Inspiring Word as at-will powers outside of combat, but must still take a short rest to recover them for use in combat. That way, your PCs get the healing the game assumes they'll be getting, but without standing around for long periods.