title: Share login info between CMSs (Wordpress and phpBB)
body: <p>Say I want to develop a site with some CMS embedded in it - e.g., a <a href="http://wordpress.org/" rel="nofollow noreferrer">Wordpress</a> blog and <a href="http://www.phpbb.com/" rel="nofollow noreferrer">phpbb</a> forum.</p>
  
  <p>What's the most convenient way to unify the log-in and sign-up process for my site? </p>
  
  <p>Letting users have a different registration process for each part of the site would probably scare any sane user away.</p>
  
  <p><strong>EDIT</strong></p>
  
  <p>I prefer generic solutions, not necessarily for the aforementioned CMSs.</p>