Slidestory

Slidestory is a nice site for creating simple slideshows w/ photos and audio narration.  Once a user register they can download a free publishing application (only works w/ Windows).  This application allows users to upload photos and add their narration.  They can then be viewed by sharing a unique URL.  There are a bunch of nice educational slideshows to view on here as well.

I recommend for Windows users to check out Slidestory by clicking here.