I did recently a webcast about MBV for the UK SOA/BPM User Group (SBUG)
Link to the video is available here : http://geekswithblogs.net/michaelstephenson/archive/2009/10/13/135448.aspx
I would like to thank Michael Stephenson for this web cast invitation which was a good opportunity for me to explain MBV goal and its usage and do some Q&A with participants !
Your welcome, and anyone who hasnt seen it, JP does a brilliant job of pitching this tool and anyone who is managing BizTalk environments really needs to know what this can do for you.
It could get you out of a sticky situation if your environment has an issue or you go in somewhere where biztalk hasnt been monitored or managed properly