Wheter you need to explain a customer a modern web-oriented service, or your friend really doesn’t know what Twitter is: Here is a collection of famous YouTube video explanations. All in plain english and fun to view.

Twitter in plain english

Wikis in plain english

Google Docs in plain english [Likely to get closed down soon?]

Social networking in plain english

RSS in plain english

Social bookmarking in plain english

Blogs in plain english

Podcasting in plain english

Googl Reader in plain english

Finally: Zombies in plain english

And electing a US president in plain english