Microsoft is developing System Center Operations Manager 2007, the sucessor of MOM 2005.

Important Changes:

Proactively manages business critical IT services including applications, the supporting infrastructure and hardware, and end user clients.
 
Reduce the complexities of managing your IT environment by providing a monitoring solution that is designed with ease of use in mind.
 
Include management packs with prescriptive knowledge developed by the application and OS development teams at Microsoft and verified in production deployments to improve monitoring, troubleshooting, and problem resolution for more than 50 Microsoft applications and Windows server components.
 
If you want to test the System center Operations Manager 2007, register to the Beta Program on :

http://connect.microsoft.com/programdetails.aspx?ProgramDetailsID=500

Microsoft System Center Capacity Planner 2006 (Beta) helps size and plan deployments of Microsoft Exchange Server 2003 and Microsoft Operations Manager (MOM) 2005 by providing you with the tools and guidance to deploy efficiently while planning for the future.

Try this:

 http://www.microsoft.com/downloads/details.aspx?FamilyId=B68C06A5-8949-4A3F-9685-21228DBE8A0E&displaylang=en

Microsoft Operations Manager (MOM) 2005 with Service Pack 1 (SP1) offers the latest security enhancements and features, including:

• Broader OS and database support, including Windows Server 2003 SP1 and SQL 2000 SP4, which enables you to leverage the latest Windows Server System software.
 
• Support for x64 platforms which allows MOM 2005 to run on and monitor the latest high performance hardware.
 
• License usage alerting which enables you to receive alerts when product usage exceeds the configured threshold of licensed OMLs.
 
• Many customer-requested enhancements to better support enterprise scenarios: • Support for disjoint namespaces with mutual authentication
 
• Support for NETBIOS names containing dot
 
• Improved robustness of heart beating and Microsoft Connector Framework
 

 To download go to :  http://www.microsoft.com/mom/downloads/2005/sp1.mspx

  Microsoft released some documents to help you start using Microsoft Operations Manager 2005.

   All links, including LAB, Evaluation version and others can be accessed on the link below:

http://www.microsoft.com/Mom/techinfo/training/getstarted.mspx

Microsoft Operations Manager 2005 helps companys in daily operations, reducing the complexity and lowering the
costs of operations. With MOM 2005 the companys can centralize all event viewers of servers, locally or remotly
and MOM analyze events and show solution for you. All event Id´s that Microsoft have articles are in MOM database,if you create one custom rule, so its recommended that you write one company kb too, and when this custom rule generate one alert, your solution will be appears in MOM Operator console. With MOM 2005 its possible too collect performance monitors, and store in new database for SQL Reporting Services create Reports for you.

If you already install the Windows 2003 SP1, read the following articles :

http://support.microsoft.com/default.aspx?scid=kb;en-us;895952

http://support.microsoft.com/default.aspx?scid=kb;en-us;895951

Microsoft Operations Manager (MOM) 2005 helps provide you with the knowledge to
avoid the avoidable–reducing the complexity associated with managing today's IT
infrastructure environment and lowering the cost of operations.

MOM 2005 helps simplify identification of issues, streamlines the process for
determining the root cause of the problem, and facilitates and can resolve some
erros automatically with your custom rules, to restore services and to prevent potential IT problems.

Download and test MOM now at:  http://www.microsoft.com/mom/evaluation/trial/default.mspx