I am currently working with another developer on a site creation. The current plan is to integrate I-rater platinum with PHPBB. So when the user logs into the main I-rater page it also logs them into phpbb. the other reason for this is because the user should not have to login twice.
Now I would like to do this with flash chat also. so basically you would work with the current integration of phpbb and i-rater and add flash chat on to that.
This should not be that difficult.