Screenr – Instant Screencasts for Twitter
http://www.screenr.com/

Now you can create screencasts for your followers as easily as you tweet. Just click the record button and you will have your readt-to-tweet screencast in seconds. Features include: a) Web based recorder – nothing to download; b) Record on your Mac or PC; c) Plays everywhere on the web, even iPhones; and d) it’s completely free. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.