We will soon be able to interact with computers by speaking to them, and even asking questions. Mike Lynch, founder and CEO of Autonomy, says that Google has 'dumbed-down search'. (http://networks.silicon.com/webwatch/0,39024667,39152404,00.htm) Should Google pretend to be Ask Jeevs and extract keywords from a question or should Google take searching beyond just keywords and truly innovate searching?

Google should ideally (in the future) understand real natural language, though we probably still end up typing it for quite a while (speaking brings with it so many problems, like privacy issues in an typical environment).

This might sound totally ridiculous, but it surprisingly isn't: i think thought control will be widely used before speech. I saw the UK's Gadget Show program, and they used a Lie Detector, hooked up to a simple PC app called "Mind Writer", and they used boolean signals to choose the correct letters and write a word.

This method, speeded up, perfected and applied to a decent user interface, could be so powerful.

No, not surprising at all :) I've read some about this as well and now that i think about it i agree with you.

For the using search engine, begin with a Keyword enough. For nature language, sometimes I can not understand my thinking in the brain clearly. It is just a feeling, can feel some point shinning.

Use Keyword, then search more articles, then research, then get result.