There is a small update to the BizTalk management pack for BizTalk 2006 and 2009.
Date Published: 2/2/2010
The 6.0.6703 version of the Microsoft BizTalk Server 2009 Management Pack for Operations Manager 2007 includes the following changes
• Fix for errors in discovery of Host Instances. Host Instance discovery has been modified to discover only the created Host Instances rather than all possible combinations of available Runtime Servers and Hosts.