Web+2.0+Resources+and+Lists

Lists of Web 2.0 resources, by categories Web 2.0 Guru site
 * Web 2.0 Guru**

Another collection of Web 2.0 sites arranged by categories, but consisting of icons on a page. Because there are so many options here, it will be very helpful for you to help us pare down the list by only listing sites which are easy to use, as well as some indication of appropriate grade levels. go2web20
 * Go2Web2.0**