I like this, opposed to other solutions to HTML's verbosity, in that this is like a Vim macro language. Quick to type, then expanded to full formed HTML. No need for any other compilation or intermediate processing to HTML.
You can also get similar results with some of the Zen Coding plugins for Textmate: <a href="http://code.google.com/p/zen-coding/" rel="nofollow">http://code.google.com/p/zen-coding/</a>
While this is very cool for producing HTML, I still like HAML and StaticMatic better because it's reproducible. The Zen Coding plugin and this both look like they are just shortcuts, whereas HAML sticks around and gets expanded when I compile.<p>#sidebar.grid_4 => <div id="sidebar" class="grid_4></div><p>And I don't lose that. I have no problem writing HTML with the shortcuts I already have - it's maintaining what's there that's the real pain, at least for me.