After the update to Mountain Lion I see that I have four accounts in my Messages app (see this question for more information). I am a bit confused about what happened here, namely:
@mac.comaccount has always been used for iChat, but now in the Messages app it looks like it is used for iMessage
- My Gmail account was used on my iPhone and iPad (I say "was" because I haven't used iMessage on my mobile devices for a while), but now it looks like it is used for GTalk in the Messages app
- I have never used Bonjour for message exchange, why does it appear now in the list of accounts?
Why have there been such changes? If I leave the situation as it is now, does it mean that I cannot receive iMessages on my Gmail account but only on the