Were you ever worried that the internet could be controlled by single vendor technology? That there is certain information that you can only see and get when using one specific browser? That interoperability is at risk?
You are certainly not paranoid if you have such worries. Microsoft Australia now gives an example for what is possible and done by offering the chance to get $10,000 by finding information on some website - WHICH CAN ONLY BE VIEWED USING INTERNET EXPLORER 8 !!
Here's what is announced on the Microsoft Australia website: http://www.microsoft.com/australia/ie8/competition/
As you can see in the picture - for me using Firefox the following statement is included right away: "But you'll never find it using that browser. (So get rid of it, or get lost)."
With this competition called "TenGrand" Microsoft provide an excellent example for the risks the internet is facing today: proprietary control over information and data in the internet. Unless you use one specific vendor's software you are excluded from access to information.
There is a role for public authorities here to ensure that full interoperability is kept and that the internet will be kept open.
For those who are interested in more details I also recommend a recent position paper from ECIS, the European Committee for Interoperable Systems, on the topic.
PS: Thanks to my colleague Arnaud for drawing my attention to that.