An excellent PDF explaining how to get the most out of Google Search. A good idea might be to print out a few copies of this and put it on the wall near your desktop computers? Similar posters relating to other google tools can be found here: http://www.google.com/educators/posters.html
The very easiest way to publish your students work. Email the work in (words documents, photos, movies, presentations almost anything) and posterous will add it to your blog.
Have just been playing with this and must say it looks pretty interesting. you can easily combine pictures, text and video. You can alos create links to other sites etc. The free version also comes with 200 student accounts. I found it in here http://teachers.net/gazette/wordpress/allison-gray/50-web-apps-for-teachers/ which came from the diigo Classroom 2.0 group.