While podcasting has been the hot new tech trend for a while know (I know, that was "sooo 2005"), the quality that each new undiscovered podcast brings is purely a gamble. As Joel Spolsky writes: "I've subscribed and unsubscribed to a lot of Podcasts trying to keep entertained on the subway . . . " The problem for podcasting is that there is still no way to get the signal-to-noise ratio up to par. This is a recurring problem, myself included. So my question is this, if anything needs a social media aggregation site, isn't podcasting it? While pure directories of podcasts are all over the internet, organization of them on a large scale has not been achieved so someone can find high quality podcasts within their interest area without going through the process of trial and error themselves.
Drawing on that, where is the del.icio.us or Flikr-style site for podcasts! Didn't we learn this lesson already with photos (Flikr) and for blogs and other content with del.icio.us? If you gave me a directory of podcasts organized by popularity (number of users subscribed) plus split into genres by the use of tagging, wouldn't podcast "surfing" generally be a better experience?
UPDATE: Podcast.net seems to have tagging covered, but is sorely lacking in community focused features and ability to sort by popularity (a must).