Diggnation is completely awesome and Im extremely sad to see it go. Say it ain't so! Alex & Kevin have produced an extremely entertaining and enlightening show. I completely disagree that Kevin Rose has "never... said anything substantial", quite the contrary. Each show is not only a friendly conversation that is easy to pay attention whether you're a tech professional or a complete layman, but the insights into Digg and it's struggles over time as well as other interesting anecdotes about technology and its evolution have taught me a lot.
Hope they change their minds on this.
They've got to be killing it on advertising but I would happily pay to watch Diggnation instead of Foundation, although There's definitely value in the later as well.