I have tried also Rocket Bridge and this. Is by far the best around, as the one from Rocket demands to have specific folders in your root to install it and it doesnt transfer all the users from Joomla installation to your forums.
Jfusion does that and many more. Exceptional support from the guys (Imran ty friend) and great package that promises an easy installation. Also i enjoyed the Tutorial Videos, what else someone can ask to?