Usually I'm the one working on my podcasts and starring in them. However I got invited to participate in and be interviewed for a podcast by Eric Johnson and Josh Jones of the Colorado Springs SQL Server Users Group. They do a weekly podcast on databases in general and are two interesting speakers. I'd recommend checking them out at PASS, the Colorado PASS camp or any of their other engagements.
They pinged me on Katmai compression, both data and backup compression. I got to pick the topic and it's an area that is of interest to me. I've got some thoughts and am working on an article, which I hope to get out in January.