Now your users can have their very own Wordpress Blog!
WP4J allows you to run WordPress Multiuser seamlessly with your Joomla Site. What's more, WP4J ships with a community plugin that adds a menu item for your users to quickly access their blog control panel and a module to display their most recent blogs.
When a user posts a blog it will be injected directly into the news stream along with a sample of gallery images (if they have created a gallery with their blog).
As we all know, content is king and now you can have your users enhancing your site content with their blogs!
I have reviewed the demo site and it appears to function well outside of duplicate URL issues (slash or double slash in the url still delivers same content without a redirect).
The bigger problem I see is the sales pitch. It doesn't seem clear enough as to why a customer would benefit from marrying WP and Joomla together rather than just using WP by itself.