You have 2 Options to add mp3 files to the site. The first one is to upload (send the file to us) If you do this the talk will stay on the computer that runs this website. As the files are very large it can take sometime to upload mp3 files. To increase reliability, speed and ease of use a small java applet will load you must accept this before proceeding. Click here to begin!
The second option is to upload the mp3 file to your own webspace, this is useful if you already upload your talks somewhere but would like them included on the site. You can also use services like http://www.humyo.com to upload talks. We have some information and tutorials on how to use this here.