Stitcher is a web service that brings together many popular news stations. The site allows you to choose which service you would like to listen to from a big list of news services and podcasts of TechCrunch. Stitcher can also be used on the iPhone.
Stitcher can be used without registering but registration allows the creation of favorites and customizing them. Stitcher also has a thumbs up system like Digg that allows you to vote on popular podcasts.