I want to

Vocaroo

Vocaroo | Record and send voice emails. Very simple and straightforward. Record what you want to say and send it on, or download it.

Audiolizer

Audiolizer.com - Listen to Streaming Music for Free.. Looks very much like Songza. I was impressed by the range of music available.

Twango - Media Sharing

Twango - Media Sharing.makes organizing and sharing your media as easy as capturing it with an easy-to-use site where you can be comfortable inviting your friends and family.             

• Organize and manage all of your media in one place—we support more than 100 types of files.
• Share
  your media your way: privately with one person or with a group, or
  publicly with the whole world—you are always in control.
• Bring every participant's media together to enrich the experience of your team, clubs or other groups.
• Republish your media anywhere on the Web—with access to fun display features such as slideshows and tickers.
• Find cool new people and media with easy browsing and searching on Twango.
• Capture the moment wherever you are with one-step sharing from your PC or camera phone.
• Invite people to view your media without forcing them to sign up.
• Get unlimited media storage, 250 mb of upload bandwidth per month, and a 100 mb maximum file size with your free Twango account.

Create your own radio station

ubroadcast™ is free software that you download to use, and if people want to listen to your broadcast they d/l as well. Apparently you can be up and running inside 5 minutes; voice, music, interviews, whatever you'd like to.

Other options are Live365 and Shoutcast.