I'm proud to present my first pubic add-on, WordPress 3.x (Users Only) to XenForo. It has taken me longer than I wish but I've cleaned up my code and added a few new features from my initial iteration and I hope it can be useful for others out in the community.
The plugin will first map WordPress roles to XenForo users groups so you can easily migrate a complex setup into XenForo.
Screenshots of the plug-in
This is an import only, not a bridge.
Please feel free to ask questions or submit any bugs.