Back in July 2007, Mitchell Baker, then Mozilla Corporation’s CEO, announced a major change with Thunderbird’s Future. Now, nearly 7 months later, David Ascher has announced the official creation of Mozilla Messaging (has unofficially been called MailCo for the past few months). This is a new subsidiary of the Mozilla Foundation, focused on email and internet communications. David explains the purpose and the goals of the new subsidiary, including future plans for Thunderbird 3: integrated calendaring (building on the great work done by the Mozilla Calendar team and their Lightning add-on to Thunderbird) better search facilities easier configuration and a…