I made a plugin that converts @username tags to buddypress profile links; it doesn't seem to integrate fully, but I'm working on it; my next project is to post new questions and answer to the buddypress activity feed, now that I know how:
bp_activity_add(
array(
'action' => $action,
'content' => $content,
'primary_link' => $activity_url,
'component' => $component,
'type' => $type,
'user_id' => $user_id,
'item_id' => $item_id
)
);
Just wondering if there is anyone interested in these sort of plugins. If so, I'll post them here.