What does it do?
This is going to be some sort of boilerplate, considered to ease your webdeveloper's life with the following features:
css/styles.css is a solid css reset (I cherry-picked the best from the YUI reset, Eric Meyer's CSS Reset, the one from the HTML5 Boilerplate and of course my own experiences), furthermore it provides you with print-styles, helper classes (.unselectable, .hidden, a semantic .clearfix and many more coming soon), styles for HTML5 elements for browsers that are not familiar with them and predefined media queries for mobile web design.
css/ie7.css fixes some bugs for IE7
js/libs/ provides you with some libraries (such as jQuery, jQuery Animate Enhanced (extends jQuery's
animate()function so that it makes use of CSS3 animations if possible), jQuery History (used for cross-browser pushState functionality and hash-fallback for IE) and Modernizr (teaches older browsers how to display HTML5 elements and provides functionality to load shivs if needed))
js/pushState.js "ajaxifies" your site, prevents the default action when clicking an internal link and instead requests the page's content via AJAX and changes the URI to the requested page's one
js/makeUnselectable.js is teaches IE and Opera how not to select something (recursively on all .unselectable elements)
there also is a .htaccess file, rewriting yourdomain/dir-where-it-is-placed/xyz to yourdomain/dir-where-it-is-placed/index.php/xyz (thus creating a virtual path, which is "parsed" by index.php)
appcache.php is like xyz.appcache (it is .php with a "text/cache-manifest"-header because some servers aren't capable of the .appcache format and serve it with a false MIME type) - set it up correctly and you will be able to display your page even if you are offline!
index.php basically does all the work (parses virtual path, created by .htaccess, into an array, sets a BASEPATH (if this file is accessed by yourdomain.com/path/to/index.php, BASEPATH will be "/path/to" -> useful for internal linking))
make a nice HTML5 sample page
working appache.php (dynamic one? (requires some additional logic for the virtual paths (as every combination (yourdomain.com/index.php/xyz where xyz could be EVERYTHING) is possible))
MVC (maybe even a leightweight CMS)
add a sitemap (maybe even generator, would do pretty much the same as the dynamic appcache.php)
icons (apple touch icon, favicon)
more leighweight version (without MVC/CMS and helper classes) or a builder (only select the components you wish)