Open search indices, Google's Achilles heal?

Open public indices for search , if expanded, could be the start of open-source-like alternatives to Google's global search dominance. With the success of collaborative open web 2.0 phenomena like Wikipedia, can much of the internet content itself be catalogued by public minded groups and individuals so that search might again be an area for innovation and experimentation? Many groups have discussed this topic but attempts at something real have been few and far between.
Could mammoth indexing tasks like the continual web crawling conducted by Google's bots, be accomplished in a distributed manner like peer-to-peer networks or systems that employ approaches like that used by BitTorrent?

Semantics

ProgenitorCE tool has helped me find relationships among concepts in software engineering such as those related to algorithms and many areas in biology. Specifically, insect behaviors and potential heuristics for optimization category problems.
The study of ant colony behavior has been studied for years in connection with such problems as path optimization but many other similar connections between entomology and computer science exist.

Recognizing Differences

Many years ago I worked as a lab technician. I learned to use a microscope to perform manual blood cell and other analyses. One thing I discovered quickly was that in order to see depth when viewing a specimen, I had to oscillate the distance of the microscope lens to the specimen. By essentially moving towards and then away from the specimen, I could sense the three dimensional character of the object.

This can be used as a metaphor in describing how we "see" in general and how we perceive or recognize (cognize?) form and definition. Concepts, ideas, or concrete things.

It is in the movement itself, back and forth, from one perspective to another, that we generate "perceptions".
Dude...