As you already wrote before at http://www.kriesi.at/support/topic/google you have no plans to integrate Google+ into the Themes.
But how about the Footer Area? I like to add a badge for my Googe+ Page (not the +1 Button).
Can you add a additional class for the Theme?
Alternatively for Workaround you may have a HTML Snippet to insert in the footer.php to update th class="social_bookmarks" for a direct Link?