Though I hope Dell will actually start using AMD cpu's, I have to see it first. Each time AMD came out with a new cpu, rumours like these have been flying around the web. I dont think Dell minds at all.. it puts some pressure on Intel, and that way Dell may be asured of even better prices and delivery. The fact that Dell doesnt use AMD cpu's, had very little to do with the performance of these chips, but very much with the close intel-dell relationship. Basically intel gives dell better prices, info and supply, as long as they dont sell AMD systems.
Remember the first P3-1 Ghz ? Basically, dell was the only one that could supply them.
I dont think Dell will be very keen to step onto intel's toes and risk loosing this position. I dont think they have much to gain. I would not be surprised if intel would actually sell dell mobile P3 cpu's at the same prices AMD will sell its mobile A4's. What is there to gain then, for Dell ?