Question: Has there been any discussion about denoting the experts of certain topics, for example MVPs or Microsoft employees in the small profile icon? 

This way users can quickly distinguish between random internet morons like myself, and the ones accredited with their chosen speciality?

Answer: 
Put the information in your profile. 

From what I have seen, most people are pretty forthcoming about their information and I haven't seen much in the way of posers and fakers.
My attitude on forums like these has always been that I'm a guy with an opinion and an ISP. The quality of my answer depends a whole lot more about what I say than that I have >10K of StackOverflow rep and a C++ badge. (The rep and badges are for personal gloating when I'm not asking or answering questions.)

However, if we are going to put rep and badge count next to our answers, we probably want to note relevant tag badges. We are apparently trying to indicate answers from more trustworthy sources, and I'm a lot more trustworthy answering C++ questions than Visual Basic questions.