Well, PalmOne is the only one I can think of with Mac supported. All the others require Windoze. But having had proper Palm training last week, I can't see any reasons why you would want to buy a windows based device, unless you want something with 802.11 built in. Even then you could look at the Tungsten C if you want a handheld or the Treo 650 if you want a mobile built in as both have wi-fi built in.