Is deep web the web where no search engine had gone before? It may be long road for general search engines to get inside deep web, and, doing so will leave deep web no more than a part of the database of search engines. Deep webs may provide some detailed topics or hot search queries for general search engines to bring users, not just only some titles or a few key words. This may be a task of data mining on the query log of deep webs.
The blog talks about data mining, algorithm, nosql, python ...