Passport to Web 2.0

http://www.screencast-o-matic.com/
Screencast-O-Matic is the original free and easy way to create a video recording of your screen (aka screencast) and upload it for free hosting all from your browser with no install!

http://screencastle.com/
ScreenCastle is a one click screencast recorder and hoster. You can record and share a screencast directly from your browser without the need to install software or register anywhere.

http://www.connect.microsoft.com/content/content.aspx?ContentID=6415&SiteID=94
Microsoft SharedView is a fast, easy way to share documents and screen views with small groups of friends or coworkers; anytime, anywhere. Use SharedView to put your heads together and collaborate – create, convey, and communicate…across physical boundaries, through firewalls, and down to the smallest details.

 
http://www.dimdim.com/
 
With no software to download or install, Dimdim forever democratizes web- based live meetings. In seconds – right from your browser – you easily host or attend web meetings complete with audio and video conferencing, screen and application sharing. After experiencing the freedom and ease of Dimdim Web Meetings, you’ll wonder why you ever used [...]

http://www.jingproject.com/
Think of Jing as a supplement to all your chat discussions, email threads, forum posts and blog entries. It sits nicely on your desktop, ready to capture and share your stuff at a moment’s notice. Simply select an area of your screen, capture it as an image or record it as a video, and then [...]

TalkShoe is an online service that allows anyone to create, host, join, or listen to live interactive talk shows and discussions. Create and schedule live multi-person conference talks, and invite interested people to join as participants or listeners.

TalkShoe Features

Create group podcasts with up-to 250 active participants and unlimited number of listeners.
Participants can join via telephone, [...]