Academic research that unknowingly (or sometimes even knowingly) duplicates secret industry work is much more valuable than this discussion indicates. Sure, it's not valuable _to Google_ for someone to publish things they already know. But everyone else benefits. If people at Google want their research to stop being duplicated, they should publish it. Of course, if your goal is that Google adopt your new system in th…
I'm not so worried about duplication by academics -- that does not happen often -- but rather about academic research that's just wrong: makes bad assumptions, uses a flawed methodology, fails to address the general case.
For example, I'd love to improve search relevance, but w/o having access to Google's search engine to build on, it's pretty hard. That's my suggestion. :-)