D'karr
Adventurer
Interestingly, one of the first [-]erratas[/-] rules updates made to 4e was to change an active Perception check from a Standard to a minor action.
So there is some precedent!
We started doing this for our home games as soon as we discovered that the only efficient way of dealing with traps was to do damage to them. Disarming them was a waste of resources, since the rogue or wizards would be tied up dealing with the trap instead of dealing with the monster threat.
With this house rule we can also have skill challenges as the battle rages without compromising the combat. We allow 2 minor actions maximum to be used during the combat in this manner.
So far it had worked very well for our group.