Check out the "Virtually Speaking Science" podcast from our March 27 show. Co-host Robin Snelson and I chatted with Caltech astronomer George Djorgovski about his efforts to put virtual worlds to work in the service of science. The hourlong show followed up on our Cosmic Log discussion about the scientific applications of Second Life. I'm returning the favor by giving a talk at Djorgovski's Meta Institute for Computational Astrophysics at 1 p.m. ET on Saturday.