Seems to work for me now - I have to say I think it is really neat and quick.
OK you haven't got all the thrills (and spills) of SnagIt or Camtasia but it is a really easy, quick and dirty way to share screen grabs and video (including system audio) in Flash format.
Ah - just discovered the catches ...
1) Graphics are restricted PNG format
2) Video is restricted to SWF format - and there are apparently no controls you can set other than the region of the screen to capture.
3) They want your money ... (surprise, surprise). Jing may be free but it only interacts with Screencast which isn't! When you sign up you get a 'trial account' which expires in 60 days after that there are charges to pay:
Having said that it could be very useful here as you can post SWF files - so if you want to include a little video to illustrate a problem it is ideal!