Live Services & Mesh Services

"Mesh services" is a term that we use commonly to refer mesh technologies that enables synchronizing user’s data and extending applications across multiple devices. They are one of the underlying core services of the Live Framework.

For example, you can consider the following services as core building block of mesh services:

• User services provide facilities for managing all aspects of a user’s Mesh (devices, applications, and data) and enabling sharing of those resources across multiple users.
• Device services provide facilities for managing the collection of heterogeneous devices within a user’s Mesh, including relationships, status, and security services.
• Application Management services facilitate the configuration; deployment and versioning of applications which utilize the Live Framework including Web-enabled Mesh Applications.
• Synchronization services as it ensures the synchronization of data and metadata between applications, devices, and the cloud.

"Live Services" are user-centric services that provide open, programmatic access to "Windows Live". These user-centric services include: Identity and authentication management, Presence Management (transient state of people and devices), Delivery engine for messages between clients and cloud. Also Device Management, Synchronization, App Management and Sharing - but these can be bundled under Mesh Services as another building block.

Mesh Services will go under umberalla of Live Services. Live Services relate to all the services related to Windows Live - hotmail, contact, profile, maps, messenger, search, etc. I think Mesh Services are the subset of Live Services related to the mesh.