I don't think so either, but editing the form on Firebug or WebKit's inspector is really easy. And the text area is looking nice, really similar to text fields :)
I'm a web developer trying to be a designer as well and the one thing that always frustrates me with HTML 5 resources is that they focus on the definition of each new element and not proper use which preserves its semantic value within a document. This one pretty much nailed it with good examples. Thanks for sharing!
Don't be jealous, on the contrary -- be thankful you got to learn without having the correct answer handed to you on a silver platter.
If there's anything to be thankful for in the current climate, it's the diversity of browsers and device form factors forcing designers to think about the layout outside of Photoshop.
It's look like it's just a base for creating nice wordpress themes. It's not intended to learn much I think.
Anyway, it has really great style. Very good looking components and very useful to get started easily with a cool site, not necessarily a wordpress one.
Only one thing I noticed. I am not sure if it is a bug, but please check this page http://pea.rs/forms/multi-left-labels (and apparently same at http://pea.rs/forms/top-labels)
It has some problems with displaying textarea, at least for me it looks like that: http://i.imgur.com/tJKiG.png
I am using Windows 7 with Firefox 9.0.1