I (among quite a lot of people I guess) have thought about using P2P for web search. In fact, P2P protocols like KAD have been using to search for quite some t

I (among quite a lot of people I guess) have thought about using P2P for web search. In fact, P2P protocols like KAD have been using to search for quite some time. What I would like to see is a search system composed of a client: 1. Implemented in Javascript (so that the user does not need to download a program to use it). 2. Defining a file format which describes one URL, with any extra useful metadata (document type, last crawling date, text content, etc) 2. Share those files using a P2P protocol like KAD 3. Is able to search in the content of the URL file for words, phrases, etc As gubatron said, having an online "frontend" would be optimal. In addition to that, people could embed the "crawling" client in their webpage (which might double as ad server) to help the crowling effort.