I only relatively recently got access to enough bandwidth to make listening to podcasts practical, have been catching up as far back as the various feeds I've subscribed to will let me, so this particular episode was from the first half of 2007.
It was quite disappointing from my perspective six years in their future to listen to them rattling off lists of future space missions which would hopefully be able to better characterise exoplanets and say of each "Nope". All cancelled or delayed or otherwise have not eventuated.
On the other hand, no mentioned that I noticed of NASA's Kepler mission, which has produced amazingly fantastic results over the past few years. So not all bad news.