Microsoft's announcement that it is migrating FolderShare to Windows Live Sync in December has touched off a great deal of confusion over Microsoft's application strategy for cross-system and cross-platform synchronization. FolderShare has been in beta since Microsoft acquired it in 2005. It is designed to allow individuals to maintain shared folders across systems, or share folders on their computers with others, both Mac and Windows clients are supported. The migration to Live Sync provides feature and branding improvements, but maintains the same basic functionality. Live Mesh on the other hand is similar to Apple's "MobileMe" to enable synchronization of things like bookmarks, mail, and contacts across multiple devices. At some point I'd expect them to harmonize features and brandings, but for now think of "Sync" as a file synchronization service.