Load the Fontific plugin above, then update the font list file using the link below. (font_list.php) I'm keeping this list as current as I can, though I know a few are missing right now. If you see one you'd like to use but I'm missing let me know and I'll update the code.
[PHP] Google font list for WordPress Fontific Plugin font_list.php - Pastebin.com
$google_fonts = array('Abel', 'Abril Fatface', 'Aclonica', 'Acme', 'Actor', 'Adamina', 'Advent Pro', 'Aguafina Script', 'Aladin', 'Aldrich', 'Alegreya', 'Alegreya SC', 'Alex Brush', 'Alfa Slab One', '...