All opinions welcome, looking for problems and questions

As a newcomer in the field of online marketing and in particulary SEO, I would like to know from you specialists in the field, what are, in your opinion, the debates, the raising questions and debates in the field. I read, among others, about the future of SEO, the SEO 2.0, the relation between organic and paid search results, the evolution of Google and of the ranking system but I was wondering what are really the burning issues in the industry and how you perceive it.
I would also like to publish and research the current trends in online marketing and/or in SEO. What would be interesting/worth to write about? I’d like to adopt a technical and a business/marketing approach. Thank you very much for you answers and suggestions and please feel free to express yourself!