RU Sirius's latest podcasts on the MondoGlobo Network feature interviews with UC Berkeley engineer/artist Ken Goldberg and "mad scientist" Jack Sarfatti. Goldberg discusses robotics, surveillance, and "tele-epistemology" while Sarfatti delves into UFOs, time travel, and the science of Star Trek. Link to Show #3 with Goldberg, Link to Show #4 with Sarfatti
UPDATE: BB reader Chris Joseph notes that the Sarfatti site I link to above is a bit cobwebby and points us to Sarfatti's blog and the Star Drive Discussion Group.