Attached is a PDF with slides from the Yaffs talk at CELF's Embedded Linux Conference Europe 2007. If you are able to view Ogg Theora video files, the talk is also online. Ogg Theora is a Free video format. Free players are available for all platforms. See the list here. If in doubt, VLC is probably available for your operating system.
If you prefer to go straight to the .pdf if clides click http://www.yaffs.net/sites/yaffs.net/files/yaffs.pdf