Kevin Holman has maintained for a while now the most useful list of hotfixes (imho) required/available for Operations Manager.
That got me thinking, are there any other useful collections of updates, service packs, knowledge base articles etc available for the other System Center products?
Couple of hours later.......
** Updated 14/10/2010 - List of ConfigMgr KB Articles Link Added and more Opalis Information**
** Updated 07/01/2011 - Service Manager SP1, ConfigMgr R3 & Opalis 6.3 information **
** Updated 18/06/2011 - Service Manager SP1 CU2, ConfigMgr Driver Hotfix **
Not strictly a System Center product, but WMI is critical for ConfigMgr & OpsMgr.
WMI related hotfixes post SP2 for Server 2003
WMI related hotfixes post SP2 for Server 2008
WMI related hotfixes post RTM for Server 2008 R2
Microsoft KB2591403 on Suggested WMI Hotfixes
Configuration Manager 2007 Hotfixes/KB Articles
Configuration Manager 2007 R3 Eval download - for Select & Technet users check the MVLS and Technet sites for the download.
KB977384 Hotfix for ConfigMgr 2007 SP2 - Needed for R3
KB2213600 - Duplicate Driver import for ConfigMgr 2007 SP2 - changes the driver import behavior.
SCCM 2007 Asset Intelligence - Certificate Update
Steve Rachui's ConfigMgr R3 Introduction
List of hotfixes and updates contained in ConfigMgr Service Pack 2
Excel File with Post SP2 Hotfixes listed along with KB Article Links
ConfigMgr 2007 Troubleshooting: List of ConfigMgr KB Articles
List of ConfigMgr 2007 Log Files
Service Manager 2010
Service Pack 1 Product Documentation Download
Service Pack 1 Technet Documentation
Service Pack 1 Retail/Eval Download - If you're using the Select or Technet version then download SP1 from either the MVLS site or Technet
Cumulative Update 2 for Service Pack 1
AD Connector hotfix for System Center Service Manager 2010 SP1 CU2 (KB2561415)
The most Service Manager information you could imagine gathered into one place by Kurt Van Hoecke
Operations Manager 2007
Kevin Holmans recomended list of SCOM Hotfixes
Cumulative Update 5 (CU#5) for SCOM 2007 R2
Opalis 6.3 Upgrade Package
Opalis 6.3 WITH 6.2.2 Package
*Please note you can only download and use this software if you are a licensed holder of a qualifying Microsoft System Center Server Management Suite Enterprise (SMSE) and/or Microsoft System Center Server Management Suite Datacenter (SMSD) license.*
Opalis 6.2.2 SP1 Release Announcement and Workflows
SP1 for Opalis Integration Server 6.2.2
Opalis Operator Console Installer Script
Opalis Operator Console Software Requirements - Provided by Marnix Wolfe in this post
Compehensive walk through of an Opalis Installation
Opalis on CodePlex
Opalis Operator Console installer from Kelverion
This is not a definitive list by any stretch of the imagination, and is more for my referrence so I can dump update links etc as I find them to save having to memorise yet another url.
Yong Rhee [MSFT] - The Troubleshooters and Problem Solvers... - WMI Hotfix lists
Configuration Manager Support Team Blog
Kevin Holman - SCOM Updates
Marnix Wolf - Opalis Links
Kurt Van Hoecke
Cliff Hobbs - ConfigMgr KB Articles Link
Graham Davies - Opalis Installation Walkthrough