For a while, I've had a vision of banking as a web service based upon widgets of functionality. This is becoming vital if banks are to fit into the semantic web. All of this is explained in my blog entry: http://thefinanser.co.uk/fsclub/2009/02/baas-banking-as-a-service-presentation.html.
Throughout the presentation there are links to the relevant entries here that explains it all too. Feel free to send me any comments or thoughts.
And, for lots more on this, have a look at my directory of social finance http://thefinanser.co.uk/fsclub/2009/04/a-directory-of-social-finance.html.