Pure FUD. Perhaps Vassil doesn't realize that 1000s of companies are happily using LAMP and other open source solutions for their blogging and business networking needs without fearing the integration bogeyman. In 1999, companies were wary of using open source, in 2005 it's a no brainer.
From Launching Blogtronix :: AO.:
You may ask why we want to use .NET vs. Drupal or some other free blogging software. Well, because after talking to many corporations and potential clients, they all want a platform that integrates with your current IT infrastructure. So, since most desktops are a Microsoft based, why would you do anything else if you are going after the corporate market.