From Google's Hangout on Air site:
Schedule broadcasts and go live in HD on Google+, YouTube, and your website. It will be recorded and automatically saved on your YouTube channel.
Host interactive conversations with people around the world. Take questions in advance from the community and answer the most popular ones live.
Control when your participants are visible, adjust their audio and video, select who’s on the big screen, add custom banners, and more.
With more and more people discovering H.O.A's it is becoming more and more difficult trying to keep up with all of these great shows.
Mark Seydel has set out to feature all these amazing shows coming up as well as the once that already have been streamed. And yes, even after the shows have streamed you still can watch them, right there on YouTube.
The archive is sorted by category or names and for a premium even allows hosts to get their episodes featured by show.