I'm really liking this theme and the modularity. I've had the easiest time hacking this theme of any I've used. That said, there's a line in feature-content.php (the first HTML line) that says:
<h3><?php echo stripslashes($feature_blockheader); ?></h3><!-- feature header -->
This thing has no id, which means I have to jump through some serious hoops to select and style it. It's doable:
#slideshow + .clear + .largespacer + h3
but not exactly pretty. So, when you update, please consider giving this element an ID.