Since Apple announced Windows compatibility for the iPod shortly after it was originally released, there has been much speculation about whether Windows users would see the beauty of the iPod interface, and switch to the Mac in hopes of finding the same ease of use for their computer.

Indeed, such a thing is difficult to measure. Without polling a huge number of actual iPod and Windows users, it's difficult to draw conclusions. There is anecdotal evidence visible on the net of Windows users swayed by their iPods to switch to the Mac, and there is circumstantial statistical evidence as well (Mac sales are up), but no proof.

Microsoft CEO Dr. Giveitupforme looks on as Will Poole demonstrates a Microsoft branded iPod wannabe.

However, perhaps the words of Microsoft executive Will Poole are proof enough.

Poole reportedly included the halo effect of the iPod on Windows users as being among the top three impediments to growth of Windows OS sales. (The other two were open source software and resistance to upgrading.)

Maybe the halo effect is real. Maybe its not. But if it has Microsoft is running, you have to wonder.