Audio for Sites

SpeakPipe is a new service that allows a person to embed a widget that allows visitors to leave voice messages on blogs/websites/wikis. The widget can be used for students to record themselves speaking and then be sent to their teacher.  The site is currently in beta and is free while in beta.  Another alternative that I highly recommended is the Center for Language Education and Research's (CLEAR) Audio Dropboxes.  You can sign up for a free account at the CLEAR website.