A VERY LONG TIME AGO :), Zhiming from Microsoft and I got together and talked a bit about why WCF is such a big deal in SharePoint.
In this video we talk a bit about why SharePoint has been so successful. And why WCF in SharePoint can have a great positive impact on your productivity. A lot of what I say in that video is still applicable to SP2010, but that video was recorded before there was ANY information out in the general world about SP2010. In fact, this video was recorded before Windows 7 or even before SL 3 :).
Well, that video is now finally online .. enjoy!