First of al I'm really happy at this kind of interface I can't wait to get it to work.
On my own server I could not get the select font to select any of the google fonts I imported. I could also not get any setting to save.
Then I tried it on a live site and I could't activate. Got this message:
Warning: require_once(/home... .../wp-content/plugins/style-it/inc/fontmanager.php) [function.require-once]: failed to open stream: No such file or directory in /home/... .../wp-content/plugins/style-it/style-it.php on line 49
I'm running WP 3.4.2 and the theme is Twenty Eleven.