Podcasting material gathered from a tech conference sounds like a natural idea. You have lots of salespeople clambering to tell you the story of their product.  Pick a good story and talk about it.  (It works for blogs, too, of course.)

From BoingBoing.net, comes a story about the Podcast Network starting The Tech Conference Show. The first four episodes are about Etech (O'Reilly's Emerging Technology Conference), that happened back in March.  The hosts, Ewan and "Crow", promise to cover the talks that generated the most buzz.  I'm eager to listen, as it looks like the second episode covers the "Getting Things Done" (AKA "life hacks") meme, which definitely has buzz at Clear Ink.

Incidentally, I enjoy another show on The Podcast Network called The Gadget Show.