You may have noticed that for the last 2 weeks we have been uploading a lot of videos.
If you want to be informed as to when videos are updated, then you can use this RSS feed.
This feed gives you the videos as and when they are uploaded. This means however that the videos are not all in order of how they were taught, but it does at least mean you will know when a new video has been posted.
My favourite way of using RSS feeds is with igoogle homepage. I find that by using this homepage I save a lot of time by not aimlessly surfing the net.