Speaking of Windows, DiDio said that while many of the IT managers polled were lukewarm on Vista, only a small number plan to dump Microsoft and switch to the Mac. "About 46 percent said that their companies were planning to skip Vista and move [from Windows XP] straight to Windows 7," DiDio said. Another 38 percent said they had no definite migration plans at the moment, while only 8 percent said that they were moving to Vista currently.

Windows 7, the successor to the perception-plagued Vista, may reach users in as early as mid-January 2009.

However, some of those surveyed acknowledged that their businesses would leave Windows for either open-source alternatives, primarily Linux, or for the Mac OS. "Just one-half of 1 percent said they were in favor of Linux or open-source," said DiDio, "but 2.5 percent said they were going to switch to the Mac."

DiDio continues to be impressed with the Mac's infiltration of the enterprise, and repeated her contention of last summer that in many cases, the numbers of Macs in a company is significant, not just one or two here and there. "Nearly a quarter said that they have more than 50 Macs," said DiDio. "At that point, you have to say 'that's traction for the Mac'."

But not all is rosy ahead for Macs in business, she warned. "As we see more Macs creep into the enterprise, you get some push-back from IT managers. They're saying, 'As we get a significant number of Macs, we need better network management tools, we need enterprise-grade technical support.'