Research on Deep Web Research seems to be a redundancy of words. But search engine technology is changing, and has much room for improvement.
I found a excellent talk on finding inspiration for research and how to go about doing it by a fellow named Conti who teaches at West Point. His talk was at DefCon and is not truly about search engine research, but actually focused upon computer security research. However, it is entirely applicable if you adjust it for search engines.
Overall, I found it inspiring and hope others will as well.