I have a course coming up in the new year where I have to select one technology (applicable to DE) to study indepth.  I have been thinking mostly about screencasting and podcasting since these are technologies that I am utilizing in my own teaching of technology at the junior high level.

I don't want to overlook anything that might not be on my radar so I thought I would poll the Me2U community.  I'm not looking for long answers here but if you could use the comment feature on this post and let me know the following:

• What is one technology that has impressed you the most about it's potential to enhance online learning?
• How should it be used to accomplish this?