Details and webcast link are here. In the past, these lectures have been archived and made available on the JPL site. However, JPL is not doing this at the moment, so the real-time webcast is the only option. Unless you live near Pasadena.
The speaker is the Chief Scientist for Mars Exploration Program at JPL. Hopefully we will get some updates on the progress of Phoenix, and more importantly, MSL, which is a JPL mission.
