Summer's here, but haven't you heard that the sun is really, really bad for you? Make like a Morlock and stay inside with sweet HD technology to keep you company. And just to make sure you're up to date with said tech, join us for the live Ustream transmission of the Engadget HD podcast. We didn't give you much heads up last week, but now you've got a few good hours to plan your cubicle disappearance for Tuesday, June 30 at 5:30PM EDT. Embedded Ustream audio/chat after the break, to be followed with a list of topics as soon as we cull the herd.