Well, podcasting is the newest way of letting people hear what you have to say. In a nutshell you can say that podcast is an audio file in mp3 format that can be downloaded (either manually or automatically) to your computer or mp3 player (not necessarily an iPod). Then you can listen to it wherever and whenever you want to. To know more about it check this link at How Stuff Works and this link at iPodder.org.
The HubbleCast is a podcast about Hubble Space Telescope and all the efforts that are being made to save it. It will be posted here on a more or less regular basis. Download it and enjoy!
The HubbleCast for May 2nd 2005 (click to download mp3)
(Mission Impossible Casting)
(new) The HubbleCast for May 18th 2005 (click to download mp3)
(Brazilian cover of Lost in Space)