Making a list of 50 things is almost as useless as not making a list at all. Give me a list of 5 and that's useful. The key value in making a list is curation.
This Week in Startups
This Week in Venture Capital
Foundation
Mixergy
I can't vouch for every single podcast, I don't have that much time, but those don't disappoint. I love the A Smart Bear blog, so I assume the podcast is of good quality.
Edit: Oh, you mean the specific collection of their previous casts. I guess you could say they're not in production any more because that list is a "best of"