While Jing is cool, it requires an install, while screenr doesn't. Does that matter for most folks? I dunno.

It's Java, so it might work on Linux, I dunno. I haven't tried. I don't have the Java plugin installed, and don't consider it worth bothering with at the moment. But, if it did work on Linux, that'd be enough for me to use it occasionally. Big projects would still make me reboot into Windows to use Camtasia, but it would definitely take the place of Jing (since I wouldn't have to reboot).

Wow, thanks for the Jing link -- it's exactly what I was looking for. Screenr is really slick in terms of UX and simplicity, but without private (or hidden) sharing like Jing, I can't use it very much for day to day work stuff.

Agreed. A better pitch may be, "the easiest way to get screencasts on the web". This is like Skitch, but for screencasts.

For Twitter buzz, throw some stupid badge in there that says, "works with Twitter!"

Jing looks like some kind of Tonka Truck toy. Design matters, Screenr has that down. Now for revenue... not sure, I just know that Twitter wins big time w/ the way Screenr is setup.