[huckfinnaafb]

It really doesn't look like variables to me. A variable would be a reference to a singularly defined property, such as a color or border style, not a hook to an entire list of properties. Certainly it could be used as a variable: that is, defining a class with a single property and hooking to that. But let's assume it's being used as a variable, why not write something like this?

    .data { 
        font-size:11px;
        font-family:Courier;
        color: #555;
    }
    .magic { 
        color: royalBlue;
    }

    <p class="data magic">Magical data</p>
    <p>Normal text with <span class="magic">magical <span class="data">data</span></span>.</p>

I've inherited .magic into .data without sacrificing the ability to use .magic and .data by itself. As long as you keep your CSS classes semantic and disperse them intelligently into the markup, it's really not an issue of making large scale changes with minimal effort. Of course, in practice, this isn't always the case, but I think adding more ways to inherit properties will increase complexity more than help write good styles.

I think the outcry for these features is a symptom of a poor understanding of the cascade and the language. There are much larger issues I'd like to see addressed, like the wide adoption of layout definitions which has better rules for defining vertical positioning and more fluid widths, both of which are pretty nightmarish without resorting to tables.