Draw it Live is a free application that allows you to work together with other people to draw in real time.  You simply create a whiteboard and share its URL to allow other people to join in. No password is required, and no special plugins are required. Just click on the link, type in your name, and start drawing and chatting with your friends:

Posterous created a how-to video that demonstrates the steps necessary to create your own group blog using Posterous. The video includes how to make your Posterous group site private.

Think Tutorial is a site providing free, easy to follow tutorials on a variety of web services and software. On Think Tutorial you will find tutorials for taking advantage of the many features of popular email services like Gmail, Apple Mail, Hotmail, and Yahoo mail. You will also find tutorials for using iWork and Word. Want to learn how to use LinkedIn, Twitter, or Facebook? Think Tutorial has you covered there too. Need to know how to alter settings in your favorite web browser? Think Tutorial has tutorials for that too.