A video on how to use Keek to make and share short video messages. Although limited to only 36 secs, this might be a good application for beginning learners, or for a quick pronunciation quiz (you will see who is taking that quiz!) You can also embed a finished recording in your blog or wiki, as well as sending it by email. A good way to have students create a short, practiced conversation. Also has smartphone apps for mobile recordings, RSS feed to follow, and links to Facebook and Twitter.
A very extensive wiki with links to a huge number of Web2.0 tools, such as presentation programs, mindmapping, comics, image sharing and editing, search, etc.
"Sites is Google's free tool to create custom websites. Similar to a wiki, you can develop the site by yourself or choose to collaborate with others on the creation and content of the pages. Then, you can decide on the level of sharing you would like to permit. You can determine who the owners are, whom you would like to give permission to edit and revise the site, and whom you would like to give permission to view the site. You can limit viewing your site to a small, private group or you can choose to publish it so that it is accessible to anyone in the world."