Zentation is pretty neat and could be very useful in making instructional materials.
Slideshare lets us upload a set of slides for sharing online, and Google Video lets us upload video for sharing online, but Zentation lets us display slides and a video together, and has tools to set the intervals of slide transitions to synch with the video.
It is easier to demonstrate than to explain, so check out the demonstration embedded below. It took about 30 minutes to slap together and takes just a couple of minutes to watch.
Above: Embedded Zentation demonstration. If you’re reading this post in an aggregator, you may need to visit the blog to see the demonstration.