I just dropped by Meta SO, and was very surprised to see a big "+200" sitting in my achievements in-tray:
It had only been about an hour since I last visited Meta, so I really didn't expect such a rep bounty to have spontaneously appeared so rapidly. Sure enough, checking the achievements drop-down confirms no rep activity since yesterday. Strange.
Then it occurred to me: I recently (within the last hour) created accounts on two other Stack Exchange sites. For each, I received the 100 rep association bonus. That's a total of 200 rep. Aha.
So, the +200 seems most likely to be the result of receiving the association bonus on those two sites. Yet, there is no mention of it in the drop-down.
Do we really need to have association bonuses show up here at all? After all, it's not like receiving one is much of an achievement.
Alternatively, if the consensus is that having the association bonus show up in the top bar is a good thing and should be retained, can we please get some kind of entry in the achievements list so that the rep doesn't appear to have come from nowhere?