I've house rule them in. Each player gets a number of surges equal to 5 + Con mod per day. Each surge heals d6 + level, or d6 + level x2 with a DC 15 healing check outside of combat. Players can also spend a standard action once per combat to spend a surge plus they get +2 to AC, Fort, Ref, and Will saves.
If a player is unconscious, then someone can make a DC 15 Heal check and then the unconscious player can spend a normal surge.
It's working out pretty well, especially since the group doesn't have a cleric.
Hyrum.