I don't think they were holding back so they could use these features as PR. It's the Gmail labs infrastructure that is driving these updates. It's apparently

I don't think they were holding back so they could use these features as PR. It's the Gmail labs infrastructure that is driving these updates. It's apparently something like an internal extensions platform for Gmail, making it a lot easier for them to develop and try out crazy ideas. http://mail.google.com/support/bin/answer.py?hl=en&ctx=mail&answer=29418 http://mail.google.com/support/bin/answer.py?hl=en&ctx=m...