I dont know if there is topic for this idea.But ill throw my suggestion.
Seems like many ppl are searching play friends from different places,example Diablo 3 discussion area,trading forums (service) etc.
I suggest to add 'looking friends' on specific trading subforums.Like every server have own 'looking friends'.
This is the place where ppl can ask friends for ubers,farming,doing paragon trading or just someone to play: )