I just came across Common Craft and their videos explaining complex topics in plain English.  They are great!  Here are some of the technology topics featured on the Common Craft homepage.  I encourage you to check them out!

• Social networking
• Social media
• Social bookmarking
• Cloud computing
• Twitter
• Twitter Search
• RSS
• Wikis

Common Craft was founded by Lee LeFever.  More "In Plain English" videos, such as this one on LinkedIn, can be found on YouTube.

If you have other examples of making the complex understandable, or making learning fun, please share them with us.