Embeddable Multimedia
Animoto - ask for an educator account - http://animoto.com or http://animoto.com/education/
FotoBabble - add sound to an image - http://www.fotobabble.com/
Glogster EDU Version - http://edu.glogster.com
PhotoPeach - http://photopeach.com/
Voicethread - http://voicethread.com