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Doesn't seem that genuine posted on a corporate blog.

is it a corporate blog, or a personal blog part of the msdn developer community? I honestly don't know, but it doesn't look like a "Microsoft" blog.

This blog is as personal a blog as a Microsoft employee can get without hosting one themselves.

As a Microsoft employee, I could have my own blog on blogs.msdn.com - but the signup process was more complicated than Posterous, so I don't.

The latter, although obviously hosted on a MS flagship property.