Podwhat ?

Who doesn't know what is podcast, word of the year 2005 ?
More precisely, this "portmanteau of "IPod" and "broadcasting" has advantages like speed, spontaneous, it can also transmit easily many informations. It permits to everyone to create his own TV or radio show, then you can publish your contents by RSS or Atom feeds and hear or watch when you want your favorite swhows !
It has also disadvantages like weight of the files but especially indexing. For the moment, it's easier to find an textual information with Google than in podcasts but researchers are working on video indexing.