BuddyPress.org

Sure, phpbb is more mature, but it is maine a discussion forum,

and for many users, it is a pain to use,, users these days, i think, are more used to facebook than forums…

phpbb is full of features but in the process the ease of use is gone,.

it is a pain to tell users, where to go even to change their profile,, or how to subscribe to a group..

for pure forums it is great, but phpbb looses on ease of use and on social front

WP-United is OK for blogs, as far as I know, they do not support ‘united’ with buddypress