In the TAP materials and on the DevCon's it was obvious to us all that the business data catalog looked likely to change the way we looked at LOB integration.
BUT, what was also abundantly clear was that it was going to be one hell of a job to author the XML that defined an application (usually means a database and relationships).
Well, Todd was a step ahead and has created a great utility application to do it all for us. For me it means that a customer I'm working with who has a number of LOB applications to be integrated into 2007MOSS (a beta 2, pilot adopter) doesn't need to wait 4 weeks while I define the XML from scratch and can have access to their data in a day...thanks Todd, the cheque is in the post...
http://www.sharepointblogs.com/tbaginski/archive/2006/07/16/9259.aspx