The ad even contains code to help Apple get started.

You should definitely make sure your desktop client is up to date.

BlackBerry has updated BBM with a new feature called Private Chat, which allows users to hold anonymous conversations by removing names from chat windows.

Facebook may be looking to enable a B2C communication model for WhatsApp. While nothing is confirmed yet, any future move in this direction would align WhatsApp more closely with Facebook's B2C plans for its Messenger platform.

Facebook has revealed the financial details about its US$22 billion acquisition of WhatsApp, with a significant amount spent on "goodwill".

There's a Chrome OS screenshot posted by a developer that shows a new messaging service from Google. There's no official word on what it really is, but it contains notifications from at least three different Google services, which would qualify it as a unified messaging system.