A number of Groove whitepapers and books were published by Microsoft on Oct 11, 2007:

Migrating to Groove 2007 in an enterprise published Phased Transitions to a New Release - how to manage a transitional mixed Groove 3.1 and Groove 2007 environment. 

Planning and Architecture for Office Groove 2007 - an 82 page document describes key Groove server and client components that comprise a Groove collaboration system, laying a foundation for deployment planning. It also addresses discusses capacity planning, network topology, and addressing failure contingencies. Server-specific sections, cover these issues in the context of the Manager, Relay, and optional Data Bridge components a Groove installation.

Getting Started for Office Groove 2007 provides instructions for getting started with installation and configuration of Microsoft Office Groove 2007 Server Manager, Relay, and the optional Data Bridge applications.

Deployment for Office Groove 2007 provides guidelines for deploying Microsoft Office Groove 2007 clients and servers in an enterprise and includes worksheets to facilitate the planning process and track procedures.

Enterprise Services Security outlines the security measures in place for Microsoft Office Groove Enterprise Services and recommends steps that administrators can take to maximize data protection within their Groove domains.

Operations for Office Groove 2007 part 1 and part 2 provides routine procedures for administering Groove 2007 management domains.Parts 3 and 4 were published in August.