There are a lot of plugins out there to secure your site.  Wordfence has become my favorite.  I now use it on the majority of my websites.  Not only does it have a feature-packed feature list to stop hackers in their tracks.  They constantly upgrade and update it to help protect against newer threats.  Their blog is also very helpful if you want to stay on top of potential problems.

While the issue was quickly resolved, the ordeal prompted Mark Maunder to donated his code to help protect others and the result was Wordfence.

With the free version of this plugin, you can log users out after a certain number of failed attempts, automatically lock people out if they try normal hacker logins and notify you when legitimate accounts log in.  It also can be set up to ad another firewall style protection to your website.

The premium version offers even more options.

The only feature request I would make would be to allow you to hid your login page via the plugin.