Hi Ed… first, please make sure you post in the forum category that relates to the theme being used (which I just moved this topic to).
As for the font style of the site title, you will have to do that with a Font plugin such as Google Fonts ( http://wordpress.org/plugins/wp-google-fonts/ ), or make the edit yourself either with Jetpack’s Edit CSS feature or a child theme (which is included with the theme). But the styling for it is in the Style.css file around line 378 and looks like this:
Alexbrush is the font I am using and the size you see is in em units, but you can change that to px if you prefer. If you want to know what em or how to convert to or from em, this online tool is one I use: http://www.pxtoem.com