It looks like I misread this article. While Microsoft and RIM are working on their own solutions, RIM has done a deal with Microsoft as well as with IBM and Novell to take instant messaging even further. According to ComputerWeekly.com –
Microsoft is extending its Microsoft Office Live Communications Server 2005 capabilities to instant messaging on mobile devices.
The company is developing a new mobile Live Communications Server 2005 client for Windows Mobile-based devices to deliver the extra connectivity.
It is based on the user interface of the Microsoft Office Communicator 2005 messaging client.
Microsoft said a beta version of the instant messaging client would be available in the second half of 2005.
The company has also signed an agreement with push e-mail solutions provider RIM to jointly develop an enterprise instant messaging client for Blackberry mobile devices supported by Live Communications Server, which should be available by the end of the year.