At the Informatology Conference in London next week, I'm running a short Twitter Workshop for those who are new to Twitter, so I've just completed the (stand-alone) presentation.
I've uploaded it to Slideshare and embedded the 3 YouTube videos I refer to, within it. It's currently being featured on their home page.
The Twitter Workshop slideset is embedded below.
You can also view the slideset on the Twitter Tutorial page at the main C4LPT website, where you can find the links to all the content