This is pretty neat. They took a HTML text input control, styled it to look like a button, and backed it with Javascript so that when you copy from it using the standard desktop clipboard it copies data as text in one or more XML formats or other microformats. You can then paste it to another control of the same variety on the same or another site that understands one of the included formats.

The idea is to allow copying and pasting of complex structured data between websites. With a helper app it can work with common clipboard formats of desktop apps as well.

How it works:
[link|http://spaces.msn.com/editorial/rayozzie/demo/liveclip/liveclipsample/techPreview.html|http://spaces.msn.co.../techPreview.html]

A simple demo:
[link|http://spaces.msn.com/editorial/rayozzie/demo/liveclip/liveclipsample/clipboardexample.html|http://spaces.msn.co...boardexample.html]

some flash demos of use cases:
[link|http://spaces.msn.com/editorial/rayozzie/demo/liveclip/screencast/liveclipdemo.html|http://spaces.msn.co...liveclipdemo.html]

Yes, it's from Microsoft. But it's cross browser (at least IE and Firefox for now) and under the Creative Commons Attribution-ShareAlike license.