This is something that I've always felt Foundation needed.
I'm a side-project hacker, and as much as I love Twitter Bootstrap I always wanted something different. I used Foundation for a few projects but found myself gravitating back to Bootstrap because of the abundance of tutorials that have built up my familiarity.<p>The structure of these lessons is great - probably more useful than Bootstrap 'getting started' pages.
The use of JSFiddle style learning is awesome.<p>The only thing I don't like is that it requires email/password - however given it's not built by Zurb I can see why the makers have gone down that path. Perhaps a better method would have been to only ask for those details once a user wants to go beyond the first few lessons?
I think the requirement of account creation is a hinderance to helping spread the word of the site...I don't really have any intention of following these lessons (because I've used Foundation before and know CSS pretty well) but I would recommend them if, after skimming them, the site's implementation is well done.<p>I understand the desire to gauge user interest and get their contact info, but why not let the signup process be more organic (i.e. you sign up after the first few lessons because you recognize the value of the service), as it is for Codecademy?<p>(there is a "view lessons" in the top right, but it's not intuitive, given the signup modal)
I'd definitely add the examples pane from the actual lessons to the home page tutorial. My impression after trying <button>Button</button> was that I need to go read the Foundation docs instead. They're pretty impressive, I doubt I'd have come back if I'd left to do that.
I have to say I've been using foundation 4 for some side projects since it was released, and really love it.<p>It's well documented, gets out of the way, and is just much more intuitive/less crufty to me than bootstrap or skeleton.
I'm running into a bug on the second lesson. Unless there's something subtle I'm not noticing.<p><a href="http://i.imgur.com/n2WcCzY.png" rel="nofollow">http://i.imgur.com/n2WcCzY.png</a>