Raymond Mitchell is a co-worker of mine at Avtex and a co-author with me on the SharePoint 2010 Six-in-One book where he wrote two chapters on BCS.
In addition to the book, Raymond also recently put together a webinar on BCS called: ‘Leveraging Business Connectivity Services’ for SharePoint-Videos.com. This webinar / video is a lead-in to the rest of the videos on DVD:
If you have an interest or need in the BCS area, check these out!