A new botnet is targeting WordPress installations all over the world. This botnet is working to brute-force attack WordPress admin login details, so they can exploit sites. More details on the botnet can be found at : http://techcrunch.com/2013/04/12/hackers-point-large-botnet-at-wordpress-sites-to-steal-admin-passwords-and-gain-server-access/
In order to protect yourself, please ensure your WordPress installation has a secure and complex password, http://en.support.wordpress.com/selecting-a-strong-password/. In addition, you may wish to change your WordPress admin username to further increase security.
If you have any questions, please do not hesitate to contact us by opening a ticket from your account control panel.