I installed wireless on our computers last month. We have three PC's in our home, one is still using Windows98, the other WindowsME, and the new one WindowsXP. Two PC's are on the ground floor, the other on the second.   We also have a wireless phone in the house.

We have not had any issues with interference on any devices. The wireless PC's work like a charm and saved a ton of aggravation and wireing hassles. I really was quite surprised at how well they work.