I think there should be a go podcast. Anyone with me?

Yes! I've thought about it a lot. The main difficulties are that:

1) Audio is not the ideal medium for Go discussion; it's too difficult to communicate a position
2) Go doesn't really have a weekly or biweekly news cycle the way most popular podcasts seem to feed on

All of which is to say that a Go podcast would probably need to be more of a meta-Go podcast, focusing on community members, popularization efforts, etc., rather than the game itself.

Unless someone knows of a way to mitigate the above?

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The road to wisdom? Well, it's plain, and simple to express: Err, and err, and err again; but less, and less, and less!