The meter element represents a scalar measurement within a known range, or a fractional value; for example disk usage, the relevance of a query result, or the fraction of a voting population to have selected a particular candidate. This shouldn't be used as a progress bar. For that role, HTML provides a separate progress element.

On Windows, will the meter be blue, like in Windows Explorer?

Added initial page/documentation at https://developer.mozilla.org/en/HTML/Element/meter with header for unimplemented. Definitely needs better examples, and the attributes section may need clarification/rework to make it easier to understand the relationships between value/min/max/low/high/optimum. Will need any application-specific notes and gecko-minversion header when support is added.

Three students (Vincent, Laurent and Yoan) are going to spend a month working on this new HTML element for a university project. I'm assigning the bug to myself to make clear that someone is working on this bug I'm only mentoring them ;)

Sorry for the bugspam but anything new ?

Isn't it working already? Apllying: document.body.innerHTML='<p>Heat the oven to <meter min="200" max="500" value="350">350 degrees</meter>.</p>' works. (code taken from MDN docs)

I tested <meter> on Firefox 18, Linux and OSX using the MDN examples, and I can confirm that it works. Test case: http://jsbin.com/ogokay/2/edit

<meter> is indeed implemented. However, three things are missing and those are the three open bugs blocking this one. We should ideally fix them to consider to be completely done with <meter>.