Yesterday, I discovered that aspect-level sentiment analysis will be an actual task at the next SemEval benchmark. That is good news indeed! I have been waiting for a suitable benchmark to participate in, and this one is right on target. A great thing about these benchmarks is the annotated data they provide, but the sense of competition and feedback on your work you'll get is really valuable as well.
If you are working in this area of research as well and you are interested in collaborating on this benchmark, please drop me an e-mail!