Classroom2.0 offers frequent (just look!) online webinars about a large variety of educational topics, mostly those involved with using technology. This calendar lists them. Click on the Agenda tab to see full listings of titles. Go to this website for more information about participation: http://live.classroom20.com/
Slideshow showing use of Google Apps for Education and how to set up, administer and use an educational Google Apps account. Apps include word processor, spreadsheet, forms, web site creation, calendar, gmail, chat, contacts list, private video, and groups.
A collection of tutorials about Diigo - using Google Notebook rather than Diigo to compile the list. (It's a good illustration of the use of Google Notebook, too!)