I don't know why, but as I try to stream the old casts on my iphone, I keep having a lot of trouble every time I load up a new story. It seems that either the website or blubrry requires a wait of several minutes between each story. Trying to play a new one immediately after finishing one always results in repeated "cannot load" messages before it finally works....
I know, I should stop being lazy and just download the 25 episode files.