The recent week I spent most of my time searching internet for a good seminar topic about crowdsourcing, I believe the hardest part of each research is topic selection, you should know what you're going to achieve, what the result of this research will be, if it will have contribution or not, will you be able to publish paper, and etc. You could be able to see the whole path of research procedure.
So I believe choosing thesis or seminar topic is a Big thesis itself!
Finally I didn't get any result from my searches. Although I get some help from a phd student in Berkeley university, and other people who have done research in this area, but after all I could not choose a specific seminar topic. Today was the deadline of specifying seminar topic. I went to see my advisor, asked him for some help; He asked me if BI, CRM, or Social Networks have any relationship with Crowdsourcing!! I replied I think social networks can help to optimize our crowdsourcing work! It was completely unconscious answer! I have not seen any paper about this case! But run the risk of being the first student (at least in my university) who will work on crowdsourcing and social networks! This was the first time in my whole life that I took a risk.
Yeah, this was the story of choosing my seminar topic, which was one of the most important decisions of my life.
I hope I get good results, and publish more and more papers, continue it for my MSc thesis and PhD thesis, etc.
Best Wishes for You.