Our video is only live during our live hours, 7-10pm Eastern, Mon-Sun. You can watch us on YouTube during our live hours here. Or, just try our audio streams.
Usually no, but it is possible.
Use the client on this page or the full screen chat. Alternately, you can IRC to irc.mixxnet.net, channel #LRN. Finally, if you would prefer a no-frills webchat client, you can use this one.
There are, as of March 2014, on our Youtube channel. You can also find any audio episode dating back to late 2006 via our MP3 Archives.