I worked out a beautiful way to integrate WordPress 3 with XenForo: imagine you have your site located at domain.com. You install XenForo at root level. You install WordPress somewhere else, let's say /wp3. Now, by using a WordPress plugin and a XenForo addon, you can access WordPress stuff at domain.com/blog. Simply speaking: /blog is completely mapped to /wp3. And also, you can use ALL XenForo's helpers inside the WordPress theme's template (the plugin is smart enough to serve legacy theme when the WordPress installation is access directly via /wp3). You can display avatar (with cards), relative timestamp, breadcrumb, title, description, etc.
The only problem is I'm short of time and I can't edit all WordPress template to make it matched nicely inside XenForo. Anybody wants to do this? Please note that this WordPress plugin and XenForo addon are going to be released freely to community.
Thank you. I will try to make a few screenshot soon.