When trying to connect jetpack 2.0 to wordpress.com I get the following error:
Your website needs to be publicly accessible to use Jetpack: site_inaccessible
Error Details: The Jetpack server was unable to communicate with your site [HTTP 408]. Ask your web host if they allow connections from WordPress.com. If you need further assistance, contact Jetpack Support: http://jetpack.me/support/
Blog is at: http://www.kennethdonk.com
No plugins installed except for akismet and jetpack.
xmlrpc.php seems accessible.