Screenr is a web-based tool that lets you create screencasts without installing any software. You just click the record button and your screen activity is recorded along with narration from your microphone. Screenr then publishes your screencast in high-definition Flash format.
Screenr makes it easy to share your screencast on Twitter, YouTube or anywhere else on the web. Even iPhone users can view your screencast.
You need a Twitter ID to use Screener!
My observation of this program…
This is really great for quick Twitter posts! Pretty much the main focus, from what I can see. And it is also great for those that don’t have or can’t afford real screen roecoding software.
But there are limitations, and it doesn’t have background noise filters and zoom capabilities.
Web 2.0: Who, What, Why, How 
ECHO – Add comments to your site
The next generation commenting system. It’s the way to share your content, and watch the live reaction. You can quickly embed Echo on WordPress, Blogger, or any website and turn your static pages into a real-time stream of diggs, tweets, comments and more.
Introducing Echo from Echo on Vimeo.
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Filed under Apps - web 2.0
Tagged as comments, echo