Rumor Correction -- Oops - Pythaeus wrote to tell us that Apple's forthcoming active-matrix color LCD PowerBook will be called the 180c and will sport a 640 by 480 screen, as opposed to the 640 by 400 LCD screens we are used to on the PowerBooks. Why do I suspect that the 180c will sell as fast as Apple can make them despite a ludicrous price? The PowerBooks strike me the best answer to the "PC's are cheaper" argument. When it comes right down to it, the more-capable and thus more-expensive PowerBooks have consistently outsold the cheaper PowerBooks, excepting the fire sale PowerBook 100s, of course.
Wake On Demand in Snow Leopard
Putting your Mac to sleep saves power, but it also disrupts using your Mac as a file server, among other purposes. Wake on Demand in Snow Leopard works in conjunction with an Apple base station to continue announcing Bonjour services that the sleeping computer offers.
While the requirements for this feature are complex, eligible users can toggle this feature in the Energy Saver preference pane. It's labeled Wake on Network Access for computers that can be roused either via Wi-Fi or Ethernet; Wake on Ethernet Network Access or Wake on AirPort Network Access for wired- or wireless-only machines, respectively. Uncheck the box to disable this feature.