There are now new features available :
Now, you can see the statistics of the other players you played with, or the ones who are in your ladders, or in Grand Master.
Unfortunately, for now, there is now way to search for a specific player (we can’t search for a player by name with Battle.net API).
If you belong to a clan, a group will be automatically created. There, you can share messages with the other members, and also upload some SC2Replay files.