Microsoft just launched their 4th iPhone application. After Microsoft Tag, Seadragon Mobile and Bing they released the official Windows Live Messenger application for the iPhone. You can chat, share photos, checking updates and emails on your Windows Live Homepage and it makes use of push notification to inform you about new chat messages. At this point its only available in the US and French App Store but other countries can download it soon.
Another iPhone Ad Attack…From Microsoft This Time

It seems to be an ad-war between Verizon and Apple. But now Microsoft is also directing its attack on Apple. Verizon mainly focused on things the iPhone lacked, Microsoft focuses on the lacks of the App Store. Ofcourse Microsoft wants to promote their own Windows Marketplace, that they launched earlier this month. » Another iPhone Ad Attack…From Microsoft This Time
The App Store: a collection of 85.000 applications. Apple has a very dominant position with such a big list. Still Microsoft thinks they can be a worthy opponent. Windows Mobile is competitor of the iPhone OS and now has a store of their own. » Microsoft Opened Its Mobile App Store
Microsoft Luring Apple Managers To Come Work For Them

The Loop reports that Microsoft has been contacting Apple retail store managers to try and change their minds to start working for Microsoft’s own stores and with higher salaries.
Microsoft launched their iPod touch competitor “Zune HD”. There are to models: a 16 GB model that comes in black and costs $219,99 and a 32 GB model that comes in platinum and costs $289,99
Microsoft Offers Bing SDK To iPhone Developers

Microsoft has posted the Bing iPhone and Mac OS X SDK for developers to utilize, according to a post on the Bing Community Blog.
The Bing iPhone and Mac SDK is available for download on CodePlex, open source under the Microsoft Public License (MS-PL).
Microsoft Details How to Port IPhone Apps to Windows Mobile

Microsoft has published a case study detailing how to port an iPhone application to its Windows Mobile platform as it prepares to launch an online store for mobile applications to compete with Apple.
A post on The Windows Blog highlights a case study published on Microsoft’s Microsoft Developer Network (MSDN) site containing a detailed technical blueprint that describes the porting of the iPhone application Amplitude to Windows Mobile 6.5. The report was created by a third-party consulting group, Crimson Consulting, and is meant to be a helpful document for developers as they build Windows Mobile applications for Microsoft’s Windows Marketplace.
» Microsoft Details How to Port IPhone Apps to Windows Mobile