While browsing through some links, came across Mick’s blog where he has written a simple script to restart all host instances of BizTalk Server 2004/2006.
Very handy indeed..
Check it out here: http://blogs.breezetraining.com.au/mickb/PermaLink,guid,1896bd0c-6124-404b-905e-22b12ef92ccb.aspx
Enjoy