I found this amazing new website that allows you to host mp3 files up to 200mb for free. It is called IRON DJ. The service is designed to allow DJs and musicians to share their work with the world. The website offers many features:

• Unlimited 200MB MP3 uploads
• Unlimited MP3 downloads
• User profile page with bio, and other booking information
• Personal podcast of your tracks
• Twitter integration
• Leave users feedback on their work