Windows 7 a threat to the MAC OS? I seriously don't think there is much of a threat there. Even Tiger is better. Windows 7 is a bit faster, and less resource intensive than Vista, but IMO not nearly as stable in its current alpha form. Frankly, having developed Windows system software for many years, I don't see any way for MSFT to match the hardware/software synergy experience of the MAC. One can try to switch back to Windows (any version), but it does not take long to remember the motivation for the MAC switch in the first place. I keep trying to go back myself, but so far to no avail.