Ever wished you could do a quick drawing of something while blogging to save yourself a lot of explaining? The new web app Sketchcast might be what you're looking for.
A simple idea in that you login to the site, start a new "sketch", and after you click the record button, you start drawing on the screen, with an option to add voice recordings. Once you've finished your sketch you click on the stop button and you can publish the sketch just like a YouTube embed, placing it on your blogs, profiles, or other web pages. You can watch an introduction video that will give you a good overview of how it all works.
The site is already live and available in nine languages including English, Spanish, Arabic, Dutch, French, Italian, Chinese, Japanese, and Portuguese.