Great web 2.0 directory

This site has the most comprehensive web 2.0 applications and tools directory I've seen. How many of these have you heard of or used before? I wonder what percentage actually have an educational application.

http://www.go2web20.net

Google Earth Update

Google released Google Earth 5.0 this past week. Now you can dive below the oceans, view historic imagery for regions, and create recorded audio/video tours. Download the new version and check it out!

Google Earth website