Theoretically, you could possibly have interference with a wireless ethernet, but I've never had any problems. I'm running both in my home and have done countless others with no problems whatsoever.
As for the emitters, I prefer to put them inside the case if the device doesn't have an IR jack on the back. It doesn't take much time and the emitters don't fall off (I wonder how many service calls there have been for this reason!).
Every day is a good day.......some are just better than others!
Proud to say that my property is protected by a high speed wireless device!