Love the theme, can't seem to get it working with a child. I'm at http://www.tucsoncrystalandchinarepair.com/blog
My best guess is that the parent stylesheet is being loaded after the child, or the child is being ignored completely.
I've cleared the cache, used !important, and looked through the header and index files for some indication of why it would load the parent last, but to no avail.
Here's what my childtheme looks like: