Hello:

Recently installed Atahualpa 3.5.3 to my site, ComicsBronzeAge.com, and I'm really enjoying it. I'm very impressed with how easy it is to customize it, and I've been kicking the tires trying to figure things out on my own. One thing I haven't been able to figure out: Is there a way to make the featured image with an excerpt "clickable," so a reader can click the image and be taken to the full post?

Thanks,
Andrew

when you say featured image, it looks like you mean the WordPress thumbnail. Yes you could make this a link, but you are going to have to dig into the code and change the html '<img...> into a link.
You might want to look for a plugin to see if there is one that will do what you want,