Thanks to Mark Ryan for posting this:

We just picked up a report of a potential bug in Groove 2007 Forms.  This issue only affects users who have their Windows installation set to any other locale than US. When your system locale is set to a non-US setting, and you load a custom Groove form that uses the app.NavigateToForm() call, you may receive a type mismatch error.

Action
Your system locale is set to a non-US setting, and you enter a Groove tool based on a custom form. This code for this form includes the following call:

app.NavigateToForm(formID, targetRecordID)

Result
You may receive the following error:  

AutoCreate_OnAfterInitialize: Type mismatch

Check to ensure tool permissions are set to allow participants and guests can create documents

Resolution

To work around this problem, have the form developer change the code to multiply the formID and targetRecordID by 1 in the line that triggers the error. The call will then look like this:  

app.NavigateToForm(formID * 1, targetRecordID * 1)

Microsoft's site for Groove partners is now up: https://www.partnermicrosoftcollaboration.com

Partners can find it difficult to find all the resources on Groove (or any other product from large vendors for that matter) in one spot.  This new site aggregates most of the resources that a partner might need to familiarize themselves with Groove, get trained and add Groove to their service practice.

Congratulations to 

Jean-Michel Davault of Homes et Process
Ashok Hingari of Computact Software Services (India) Pvt Ltd
Jeroen Jansen of Getronics
Aaron Saikovski (now with Microsoft so, unfortunately, there are only 8 in the world - ed July 30 2008)
Evan Venn of Activty4

Bringing to 9 8 the number of Microsoft Valuable Professionals in the world.

Five new Groove Tool Templates, in Microsoft lingo, "PowerToys", have just been released, so you can quickly add more value to Groove installations.

Groove 2007 Tool Template: Time Tracker
Enables professional services firms, consultants, and other mobile employees to record their billable time in Microsoft Office Groove 2007.
 
Groove 2007 Tool Template: Project Status Reports
Project Status Reports enables teams to write and track individual and group activities in Microsoft Office Groove 2007.
  
Groove 2007 Tool Template: Asset Tracker
Track relevant assets within a Microsoft Office Groove 2007 workspace. Examples include equipment, facilities, and properties.
 
Groove 2007 Tool Template: Proposal Tracker
Proposal Tracker enables teams to track proposals and their status using Microsoft Office Groove 2007.
 
Groove 2007 Tool Template: Issues & Tasks Tracker
Track open issues and critical tasks, assign owners, and view status in Microsoft Office Groove 2007 workspaces.

A new collection of online courses is available. This material prepares people for Exam 70-555, Configuring Microsoft Office Groove 2007

Collection 6452: Implementing Microsoft® Office Groove® Server 2007
 
In this 12 hour on-line collection, IT Professionals will learn how to Implement, Configure and Manage Microsoft Office Groove 2007. Topics covered within these courses include:
   Installing and Deploying Microsoft Office Groove 2007
   Configuring and Administering Microsoft Groove Server 2007
   Managing Groove Accounts and Workspaces
   Using Advanced Microsoft Groove Server 2007 Workspace Tools
   Implementing Microsoft Groove 2007 Disaster Recovery and Groove Data Bridge
   Securing and Maintaining Microsoft Groove 2007

Student prerequisites

To get the most out of this course the target audience should have previous experience with Windows Server technologies, such as:

SQL Server
SharePoint Services
Windows Server 2003
 
 

Groove Web Services V12 Helpers is an easy to use API that provide a standards based (SOAP, WSDL, XSD), rich, programmatic access to Groove data services.  This open source project allows developers to create robust enterprise integration applications.

A new book, Microsoft Office Groove 2007 Step by Step, written by John Pierce and Rick Jewell, has just been published and is available on Amazon.  Weighing in at 364 pages, it's not one for the plane.

Here's what Amazon says:
Experience learning made easy quickly learn how to use Office Groove 2007 to dynamically and effectively collaborate with team members. Work at your own pace through the easy numbered steps, practice files on CD, helpful hints, and troubleshooting tips and learn how to work better together. You ll learn the basics for getting started, including how to manage your Groove 2007 accounts and contacts and how to create new workspaces. After you re up and running, you'll discover the communication features of Groove 2007, and see the benefits of tight integration with Office Communicator and Windows LiveTM Messenger. You ll learn how to manage your messages and chat in real time, and how to manage your appointments and notes. With STEP BY STEP, you can take just the lessons you need or work from cover to cover. Either way, you drive the instruction, building and practicing the skills you need, just when you need them! Includes an easy-search companion CD with hands-on practice files, a complete eBook, a bonus quick reference to the new user interface, and more!

Key Book Benefits

• Learn how to use Office Groove 2007 by taking just the lessons you need or by working from cover to cover you set the pace
• Includes coverage of the fundamentals, including setting up workspaces, managing your communications, and managing meetings and notes
• Features easy-to-follow lessons and hands-on, skill-building exercises
• Includes a companion CD with practice files and other resources

About the Authors
Rick Jewell is a support engineer for Microsoft Corporation where he worked on the 2007 Microsoft Office system since Beta and created training materials for Groove 2007. He has 12 years of experience in customer support and education in the technology industry from start-ups to Fortune 500 companies.

John Pierce was a Microsoft employee for nearly 12 years and now enjoys being a freelance writer and editor. He is the author of Microsoft Office Access 2003 Inside Track, the coauthor of Microsoft Small Business Kit, and has contributed to numerous other books about Microsoft software.