Centering Images with CSS is a quick and easy tutorial.
The Webstock recordings are online. These are the February 2009 event in Wellington, but older Webstock material is still available, too. Excellent speakers and topics.
How to Conduct Live Polls Via Twitter and SMS is a great tip for speakers and teachers. It explains how to use Poll Everywhere.
Spezify is a different kind of search. Try searching on your own name. You get visual results and excerpts of things you’ve published. Interesting the way it displays and organizes the results. Wonder how it decides what is important?