Some decent info:

Article:

http://www.gotdotnet.com/Community/Workspaces/viewuploads.aspx?id=0d1aa85c-cf8d-497e-84f4-3ffec8db115f

 

Webcast

http://msevents.microsoft.com/CUI/EventDetail.aspx?EventID=1032247146&Culture=en-US

 

Related blogs with information on Sharepoint and Biztalk

http://weblogs.asp.net/scottwoo/archive/2004/03/01/82341.aspx

 

http://weblogs.asp.net/jan/archive/2004/04/06/108252.aspx