Hypersmurf
Moderatarrrrh...
"WotC has been asked this precise question". I didn't know that. Then the CB is mistaken, really mistaken. The stat block shows cleary that the power is a Daily*(star) power (black color), but with the special line, like the encounter power of the cleric.
The Special line is part of the power, but it's overridden by the condition laid down in the feat - you can use the power once per day.
What happens when you use Healing Word? The target can spend a Healing Surge, +1d6. So what can you do once per day? Make the target spend a Healing Surge, +1d6.
The Special says you can use the power twice per encounter - that is, twice per encounter, you can make a target spend a Healing Surge +1d6 - but you actually can't, 'cos the feat says you can only use the power once per day.
-Hyp.