Shameless plug here for a new Podcast called Living Space - being presented by The Sky at Night co-presenter Dr Chris Lintott and Heart 106.2 radio preseter Hariott Scott.
Alternatively subscribe to this - http://www.audioagain.com/podcast.php?channel=space - in iTunes
Why the sameless plug? I'm in the first episode Also - some Venus Express info as well!
Between this and Planetary Radio I think we're quite lucky!
And please don't kill me if I got anything wrong about the new science at Gusev