Behind the scenes, a search on Google involves at least a thousand machines. How much extra state (internal connections, memory for partial results, etc.) woul

Behind the scenes, a search on Google involves at least a thousand machines. How much extra state (internal connections, memory for partial results, etc.) would such a new search type create? How do you deal with a new kind of hot spots now? What if millions of people suddenly activate such an option? What if a botnet does it?