The Jetpack plugin for WordPress supports Infinite Scrolling, but the latest version of this theme doesn't!
In the meantime, I've added support manually, and it works quite well on my blog @ g-liu.com/blog. You guys should consider adding it!
It's pretty simple to add. All one has to do is go to /functions.php, add these lines of code in
add_theme_support( 'infinite-scroll', array(
'container' => 'content',
'footer' => 'colophon',