If you want to know what might happen next month, or even next year, or if you want a technology tutorial, Martin Geddes is not necessarily what you will be looking for.
If you want to know the deeper, broader trends that shape communications, and what service providers might have to do to re-architect their business models, you might not be able to do better than to listen to Martin.
Here's an audio and written version of his latest musing on the future service provider business model.