The SCOM 2007 BizTalk Management Pack has finally been released. The Management Pack is a complete rewrite and covers BizTalk 2006, BizTalk R2 as well as the new features of R2 including RFID and the EDI functionality. You can download the Management Pack here.
Also, If you were familiar with the Management Pack for MOM 2005 you will notice a number of changes. The biggest is the change to the alerting functionality. In SCOM you create subscriptions which will provide you with alerts for all of the events. If you are looking for the alerting functionality that MOM 2005 had (the ability to pick a rule and provide an alert based only on that rule) you can find a Powershell script on the Manageability Team Blog titled: OpsMgr 2007: Creating a subscription for future occurrences of an alert. The script takes two parameters; the RMS server address and e-mail address you want notifications sent to. After you follow the steps outlined you will see a specific notification for that problem and SCOM will send e-mails to the e-mail address you entered in the script.