Microsoft's Free Sync Service (...this used to be the FolderShare service and is now part of Microsoft's sync.live.com)

Last week, I (David Pogue) wrote about an underpublicized gem in Microsoft's Windows Live suite of free online and offline

services and programs: SkyDrive. It's a free, 25-gigabyte virtual hard drive on the Internet, accessible from any computer.  My readers gently pointed out that I managed to miss an equally spectacular feature: Windows Live Sync. It's

another very good, very free Windows Live service, for Mac and Windows, that everyone should know about.  The problem: you have a work machine and a home machine. Or a desktop PC and a laptop that's frequently  out of the house. Or a family. Or a small business.