Although, I plan a full review of Gmail + Talk soon, I wanted to just point out that if you hit Gmail over SSL, you won't have any Talk features. Even if your account has Gmail + Talk already, you will only have those Talk features when accessing the regular http://mail.google.com/mail. I'm not sure whether this has to do with the roll out of new features or not. Possibly when you go to https:// you are hitting different servers that just haven't been upgraded yet. I have no idea, I just thought it was kind of interesting.